Plain sailing – an enjoyable ride
Across
1 FISH-OIL (marine substance) IS H in FOIL (thin sheet)
5 FITMENT (furniture) FIT MEN (gym goers) T (time)
9 IN ONE (combined) NO (number) in [m]INE
10 NECTARINE (fruit) EC (city) TAR[t] (lot of acid) all in 3×3 = 9
11 DINNER SET (for entertaining) N in DINER (restaurant) SET (group)
12 EXTRA dd
13 SYRUP (sweet liquid) S (sun) R (river) in YUP (certainly)
15 ACCESSORY (additional) CE (church) in (A CROSS)* Y (yard)
18 JELLY BEAN (sweet) (BELLY)* in JEAN (woman)
19 LOTUS (plant) hidden in [p]LOT US[ually]
21 COCOA (drink) CO x 2 (firms) A
23 PRIVILEGE (advantage) VILE (foul) in PRIG E (European)
25 STOCKPILE (accumulate) STOCK (family) PILE (fortune)
26 DROLL (amusing) L LORD<
27 PIT STOP GP Grand Prix (TOTS)* in PIP (disgust)
28 TRAILER dd
Down
1 FAIR DOS (equal treatment) (IF ROADS)*
2 SCOUNDREL (rogue) C (canine) in SOUND (trustworthy) REL
3 OBESE (with belly) OBE (award) S (soprano) E[xhibits]
4 LANDSCAPE (art work) C (college) in LANDS (secures) APE (copy)
5 FACET (look) ACE (outstanding) in FT (paper)
6 TRAVERSAL (crossing) Ben TRAVERS (writer) A L (a line)
7 EVICT (throw out) hidden in [twe]E VICT[orian]
8 THERAPY (treatment) THE (article) RAP (criticism) Y (unknown)
14 PAY PACKET readies – money for work
16 CONFIDENT (bold) CON (inmate) DEN (evil haunt) in FIT (suitable)
17 ON THE BOIL (active) ON (cricket side) HE (man) B (bachelor) in TOIL
18 JACKS UP (raises) JACK (card) SUP (drink)
20 STELLAR (excellent) LL (lakes) in (RATES)*
22 CLOUT (influence) U (university) in CLOT (fool)
23 PRIMP (titivate) RIM (edge) in PP (pianos)
24 INDIA (country) IN (fashionable) AID< (support on the rise)
( )* = anagram dd = double definition [ ] = omit < = reverse
4 d doesn’t quite work for me. Putting C “college first” in the middle of the word can only be indicated by “secures”, but “secures” is already being used to give LANDS. If I’m being pedantic, “artistic work” = LANDSCAPE but “college first secures copy” = CLANDSAPE. Otherwise I found this a very enjoyable crossword.
re 4 I read this as c for college, first indicating prior to that we have lands plus ape.
@Flashling thanks, that makes sense.