A Christmas Crossword Celebration Party! I think this one is a bit harder than the 1913 instance. Though I have to say that having struggled with Pointer’s Listener, this felt like R&R. Missing across clue Cs in red. Missing down answer Cs in blue.
ACROSS
1 Lout seen in a rap Hamlet played with open-air auditorium (13) AMP(HIT)HEATRAL – clout=hit in (a rap Hamlet)*
11 Man-made resin, special one left by artist (5) S,A(RA)N – wrap. cleft. one=an.
12 Bishop’s hair with little left to list suddenly (4) SEE,L – see=Bishop’s chair (seat). seel=heel suddenly
14 Birds messed up loo with foreign snacks passed round (9) TAPA(COLO)S – loco* in tapas. S American passerine birds.
15 Number one rook almost in retreat, one of a series (6) [n]OLEF,I,N – (a hydrocarbon) in a series. Weak definition since so vague. rev([f]elon=crook)
16 Sot typically almost always bottled? Illusion (4) M(AY)A[c] – typical Scot=mac. Maya=illusion.
17 At entering fidgety mare – protective covering required (6) RA(DO)ME – act=do in mare*. Protective covering for radar.
19 Ma’s making more racket, row that is curbed by bishop (7) Mac’s (Scots) R(OAR,IE)R – Scots noisier.
23 See preamble (7) CENTURY – fitting indeed.
24 Rack sailor’s found behind petroleum (7, 2 words) ROCK TAR – petroleum… crack=rock (the drug)
25 Greeting ash half spent on faulty loom (6) [ca]SH,OLOM* – shalom. cash
28 All during hunt recalled triumphant shouts (4) This must be the questionable plural that’s a Scrabble word: OHOS – oho=triumphant surprise. Call. rev(soho=huntsman’s halloo)
30 Declaration one of us included in traditional welcome (6) once (indicating archaism). AV(OUR)E – Spenserian avowal=declaration. AVE=traditional welcome.
31 Old hooking tool that’s dug inside arid fruit? (9) CRA(BAP)PLE=acrid fruit. craple=grapple for Spenser. And obscurely enough, bap=dug=breast.
32 Exited, last to leave – it’s the wine (4) ASTI[r] – excited is astir.
33 No longer coupled? Time for wining around end of union (5) MEI(N)T* – archaic coupled. Wincing is anagrind.
34 Among the stars, diner’s tie hanging, truly Scottish (13) INTERSIDE*,REAL – interstellar. Real is truly in Scots, for real. Changing is the anagrind.
DOWN
2 Roughly handle a spot on the skin (5) MA,C,UL,A – spot on the skin and maul=roughly handle.
3 Meddled with amount put to buyer (5) PRI,C,ED – pried=meddled
4 Archetypal bigot tucked into wine, in intermediate position to shoot (7) H(ALF,C)OCK – ref. http://en.wikipedia.org/wiki/Alf_Garnett
5 Air navigation system cheers airmen in extremis (4) TA,C,AN
6 After imaginary illness the prior worsened, unhealthily engorged (11) HYP,ERTROPHI*,C – where hyp=abbrev(hypochondria)
7 Strange ideas consuming Afrikaner devoted to eating (7) EDA,C,I(OU)S – devoted to eating. OU=S Afr man in ideas*
8 Cargo barge, feature of Manila’s commerce (4) C,ASCO – hidden. It’s a barge indeed.
9 Get tame thus … male tiger when it’s trained (6) RE,C,LAIM – comp. anag. &lit since (get + RE[c]LAIM) = (male tiger)*.
10 Greek monk, see, immersed in English philosopher (6) C,A(LO)YER – ref. http://en.wikipedia.org/wiki/Alfred_Jules_Ayer. Greek orthodox monk. Another kind of see.
11 Compound mineral shattered most of lorry in violent impact (9) S,C,H(ORLR)OCK – (lorr[y]) in shock. Black tourmaline.
13 Fellows in gym after scrape climbing steep slope (9) ES,C,AR,P(MEN)T – rev(rase=scrape)
18 Swag turning up above centre of finery (7) EN,C,ARPUS – festoon (of fruit)=swag. rev(supra=above, [fi]ne[ry]). Hard clue. Took me a long time to decode — I was misled by UP being the reversal indicator and included in the answer.
20 US folk musician loves appearing in name on cup? (7, 2 words) Ah… i’m of the right generation. It’s RY (C,OO)DER – ref. The Ryder cup. And http://en.wikipedia.org/wiki/Ry_Cooder
21 Rock and roll pioneer styled ‘Rancho’ (6) C,OCHRAN* – (rancho, c)* http://en.wikipedia.org/wiki/Eddie_Cochran
22 Former border as in a small bed (6) A,C,CO(AS)T – Spenserian border.
26 She may keep a Skye inn, half-hearted about island (6) LU,C,K(I)E – Scots female alehouse keeper. Cf. lukewarm.
27 Gold covering a sort of trumpet (5) C,OR,ON,A – ref. trumpet of a daffodil
29 Status of professor, old-fashioned type (4) C,HAIR – where hair is obs. type or character.
30 What’s put over a pan, warm (4) C,A,LID – warm
This puzzle is under embargo until midnight 4th/5th January