Thanks to Sleuth. Definitions are underlined under the clues.
There are a number of clues/solutions connected to food, and to mental states, whether coincidentally or not.
Across
1 Merriment shown by artist in varied rides in charitable event? (10)
FUNDRAISER : FUN(merriment/amusement) plus(shown by) [RA(abbrev. for “Royal Academician”, a member of the Royal Academy of Arts/an artist)] contained in(in) anagram of(varied) RIDES.
7 Criticism about marks in entry to underground car park? (4)
RAMP : RAP(severe criticism/reprimand) containing(about) M(abbrev. for “marks”).
9 Modernist painter is tense getting off a Caribbean island (4)
CUBA : “Cubist”(a painter who is a follower of the relatively modern Cubism art movement) minus(… getting off) [“is” + “t”(abbrev. for “tense”, in grammar)] + A.
10 Terrible fault lots principally hide with very great speed (2,4,4)
AT FULL PELT : Anagram of(Terrible) [FAULT + 1st letter of(… principally) “lots“] + PELT(hide/the skin of an animal with fur, wool or hair still on it).
11 Figure I ignored in place to get small basket (6)
PUNNET : “nine”(figure 9) minus(… ignored) “I” contained in(in) PUT(to place in position).
12 Wild supporter, one entering clubs almost packed (8)
FANCIFUL : FAN(a supporter/one who has a strong interest in someone or something) + I(Roman numeral for “one”) contained in(entering) [C(abbrev. for the suit of clubs in a deck of playing cards) + “full”(packed/containing the maximum amount) minus its last letter(almost …)].
Defn: …/illogical.
13 Rail route diverted to avoid Austria? It’s not immediately apparent (8)
ULTERIOR : Anagram of(… diverted) “Rail route” minus(to avoid) “A”(the International Vehicle Registration code for Austria).
15 Leading demonstration with no end of pandemonium (4)
ARCH : “march”(a form of demonstration/protest) minus last letter of(with no end of) “pandemonium“.
17 Fancy greeting retained by western male (4)
WHIM : HI!(a friendly greeting) contained in(retained by) [W(abbrev. for “western” + M(abbrev. for “male”)].
19 Brash ways found in middle of Indiana and Montana (8)
IMMODEST : MODES(ways/methods of doing something) contained in(found in) [middle letter of(middle of) “Indiana” + MT(abbrev. for the US state of Montana)].
22 Triumphantly exhibit part of a grain-based diet? (8)
BRANDISH : [BRAN DISH](literally a food made from bran, as part of a grain-based diet).
23 Meat for a picnic container (6)
HAMPER : HAM(salted or smoked meat from a pig’s leg) + PER(for a/for each one, as in “a fee of $1500 per day”).
25 One tent is assembled around hotel in the most showy way? (2,3,5)
TO THE NINES : Anagram of(… assembled) ONE TENT IS containing(around) H(letter represented by “hotel” in the phonetic alphabet).
Defn: …, especially in dressing.
26 Comment unavailable online? (4)
NOTE : [NOT E-](not available online over the Internet, represented by the prefix e-, as in “e-book”)
27 Ring inventor (4)
BELL : Double defn: 2nd: Alexander Graham, the inventor of the phone.
28 Centre as is has to mobilise opposition (10)
RESISTANCE : Anagram of(… has to mobilise) CENTRE AS IS.
Down
2 Turn out soup ably on a regular basis? That’s not customary (7)
UNUSUAL : Every other letter, starting with the 2nd letter of(… on a regular basis) “Turn out soup ably“.
3 Thing that can get blocked in Germany with wet weather (5)
DRAIN : D(the International Vehicle Registration code for Germany) plus(with) RAIN(wet weather).
4 Rota a bit changeable in food processing venue? (8)
ABATTOIR : Anagram of(… changeable) ROTA A BIT.
5 Ordinary paper providing on board ship curtains, maybe (4,11)
SOFT FURNISHINGS : [O(abbrev. for “ordinary” – anyone who can quote an example?) + FT(abbrev. for the Financial Times, a daily newspaper) + FURNISHING(providing/supplying with)] contained in(on board) SS(abbrev. for “steamship” in ships’ names).
Defn: Room decorations made of cloth, such as/maybe curtains.
6 Regulation characterising a party in power? (6)
RULING : Double defn.
7 Carpet and rug initially displayed by fellow in form of pride (9)
REPRIMAND : 1st letter of(… initially) “rug” plus(displayed by) [MAN(a fellow) contained in(in) anagram of(form of) PRIDE].
8 Furry creature without a tail, not half attractive – and one with a shell (7)
MOLLUSC : “mole”(a furry rodent) minus its last letter(without a tail) + “luscious”(sexually attractive/ravishing) minus its last 4 letters(not half …).
14 Male then working to accommodate rightwinger in consortium, element on a Swiss board? (9)
EMMENTHAL : Anagram of(… working) MALE THEN containing(to accommodate) last letter of(rightwinger in) “consortium“.
Defn: …, a cheeseboard, that is.
16 Writer upset over short period is getting stress (8)
EMPHASIS : Reversal of(… upset, in a down clue) ME(the writer using the self-referential pronoun) placed above(over, in a down clue) “phase”(a distinct period of time/a stage in a series of events) minus its last letter(short …) + IS.
18 Chemical agent has second name in support needing no introduction (7)
HORMONE : [MO(short for “moment”/a second/a very short time) + N(abbrev. for “name”)] contained in(in) “shore”(a support/a prop or beam against something weak) minus its 1st letter(needing no introduction).
Defn: … /an ingredient in your body chemistry.
20 One doubtful in this way about church power over time (7)
SCEPTIC : SIC(in this way/thus, used in text to indicate that it was thus written, despite it seeming peculiar) containing(about) [CE(abbrev. for the Church of England) + P(symbol for “power” in physics) + T(abbrev. for “time”)].
21 Meal in end cooked close to another (6)
DINNER : Anagram of(… cooked) IN END + last letter of(close to) “another“.
24 Obsession arising in Spain amazingly (5)
MANIA : Reversal of(arising) hidden in(in) “Spain amazingly“.
An interesting challenge from Sleuth – my first, I think. Strangely, I found the down clues much more readily than the crossers, especially in terms of parsing. So, thanks Scchua for a thorough and well illustrated blog. The image of Bong Joon-ho was perfect for the witty 22ac.
Having jumped the gun, I pencilled in AT FULL TILT which held me up initially but at the second sitting, I noticed “hide”. Still, I failed to spot MOLLUSC. EMMEMTHAL was a particularly favourite and 27ac admirable in its brevity. Thanks to setter and blogger both.
Whoops, EMMENTHAL!
Thanks, scchua: OS for ‘Ordinary Seaman’ springs to mind; also O-level. Thanks for the detailed parsings; and thanks to Sleuth for a testing but completely fair Tuesday puzzle
Thanks Sleuth and scchua
Quite an entertaining puzzle today with a lot of single letters that needed to be dealt with in the word play – some very clever ! For instance, I came here thinking that the abbreviation for Indiana was IN and not I – it turns out that it was the ‘middle of Indiana’ to give the I. … and a salute to the setter !! A number of anagrams were used and most of them were good and some very good – particularly liked TO THE NINES and ULTERIOR.
Liked the word play for MOLLUSC and SOFT FURNISHINGS. Interesting to see the ‘reprimand’ / REPRIMAND crossers at 7a / 7d.
Finished by using a word finder as I hurried to get this finished to find REPRIMAND and FANCIFUL.
A bit of a challenge — my unfamiliarity with AT FULL PELT, PUNNET, MOLLUSC (with a C at the end), and carpet as a verb (as opposed to being “called on the carpet”) led to a DNF for me. On the bright side I learned a few things. EMMENTHAL was my favorite clue. Thanks Scchua for the well-illustrated blog and for unwinding some of the parsing especially ARCH and HORMONE. Thanks Sleuth for a rare appearance.
A bit tricky in places but we got it all in the end. The SW corner held us up for a while but once we got BRANDISH that led to HORMONE and thence to TO THE NINES. Elsewhere we had a few minor problems with partial anagrams sorting out which bits of the clues were the anagram fodder.
ULTERIOR and EMMENTHAL were our favourites.
Thanks, Sleuth and scchua.
Isn’t a hormone is a biochemical ?