Across:
1 The penny dropped (got it! = GOT ---- ---- IT) going around on holiday (AWAY) – the funny one (WIT-) from hotel (-H) (GOT AWAY WITH IT) didn’t have to pay! (GOT AWAY WITH IT),
10 Nothing (O-) at (-AT-) dinner (-MEAL) (OATMEAL) is eaten for breakfast (OATMEAL),
11 Lay (lay = -ALY-) off (= anagram indicator) principal percussionist (principal “percussionist” = -P-) in Cork Symphony Orchestra (C-SO) (CALYPSO) offering chorus from the Caribbean (CALYPSO West Indian music),
12 Tips on back of envelope (tips ‘on back of envelope’ = OBOE) by one of those down the pits (OBOE in orchestra pit),
13 “Yes Men” (yes men) dismiss head of state (head of “state” = s) (“yesmen” dismiss “s” = YEMEN) in Asian country (YEMEN),
15 Knocks back (= reversal indicator) sample of alcohol somewhere (sample of ‘alcohol somewhere’ = olso = OSLO) in European capital (OSLO),
17 One of the family (DAD) characters in background admonished (characters in ‘background admonished’ = DAD),
19 Comes about as a consequence (ENSUES) of head endeavouring (head ‘endeavouring’ = E-) to take a case (-SUE-) in school (National School = -N-S) (ENSUES),
21 Censor (CUT) describes the bad stuff (OFF) (CUT OFF) from Partition (CUT OFF),
22 Communiqué (MESSAGE) coming from shambles (MESS-) on Midway (mid ‘way’ = -A-), for example (e.g. = -GE), looking back (= reversal indicator) (MESSAGE),
23 Ring (O-) Panama (-PA-) and Quebec (Quebec = -QUE) (OPAQUE), as it’s not clear (OPAQUE),
25 Mishit (mishit = ISTHMI) shot (= anagram indicator) in Panama and others (ISTHMI),
27 Womaniser leaves housewarming (‘womaniser’ leaves ‘housewarming’= hug = HUG) with squeeze (HUG),
29 Bit of breakfast undercooked (bit of ‘breakfast undercooked’ = stun = NUTS) served up (= reversal indicator) with crackers (NUTS),
30 A measure of the gold (CARAT) ale off the à la carte (‘ale’ off the ‘a la carte’ = acart = CARAT),
31 Segment of Metallica showstopper (segment of the ‘Metallica showstopper’ = CASH) from the capital (capital/money = CASH),
34 Edited (AMENDED) Dead Men (dead men = AMENDED) Walking? (= anagram indicator),
35 Hostile (GLACIAL) to a Gallic (a Gallic = GLACIAL) novel (= anagram indicator),
36 Roger (GOT THE MESSAGE) saw the light (GOT THE MESSAGE).
Down:
2 Alternatives (OPTIONS) to tritium (-T-) in prepared (= anagram indicator) poison (poison = OP-IONS) (OPTIONS),
3 Heartless (n) woman (‘Agnes’ without ‘n’= AGES) from 1920s & 30s for instance (AGES),
4 In league with (ALLIED) boy released by Old Bailey (‘boy’ leaving ‘Old Bailey’ = ldaile = ALLIED),
5 It’s morally wrong (WICKED) for women’s group (Women’s Institute = WI-) to take weekend (‘week’ end = -K-) in Clare (CE= -C-E-) and Dublin (-D) (WICKED),
6 It’s an angle (TILT) to extract from support literature (extract from ‘support literature’ = tlit = TILT) review (= reversal indicator),
7 Devil (IMP-) joins a (-A-) saint (-ST-) from Order (-O) (IMPASTO) in the process of painting (IMPASTO),
8 Secured a private road (GOT ONE’S OWN WAY) and avoided a tantrum? (GOT ONE’S OWN WAY),
9 Received rap on knuckles (GOT OFF LIGHTLY) for showing off (= anagram indicator) Togo (Togo = GOT O-) to party (Fianna Fáil = -FF) – not seriously? (LIGHTLY) (GOT OFF LIGHTLY),
14 Doctor (= anagram indicator) Erasmus (Erasmus = MASSEUR) is a hands-on type of person who reduces the tension (MASSEUR),
16 Primate (LEMUR) rejects all (= reversal all indicator) drink (rum = -MUR) from English (-E-) novice (learner = L-) (LEMUR),
18 Five-ninths (five-ninths) of the posers (questions) (five-ninths of questions’ = QUEST) in The Odyssey? (QUEST),
20 Get a glimpse of (SEE) Croft getting off scot-free (‘Croft’ getting off ‘scot free’ = see = SEE),
21 Opens for Coldplay, Genesis, INXS (opens for ‘Coldplay, Genesis, INXS = CGI) in the SFX (SFX = Special ‘FX’ = special ‘effects’ = CGI),
24 Road, etc., (road etc = ART DECO) from the 1920s (ART DECO),
26 Warming (HEATING) to hotel (H-) taking all the food perhaps? (-EATING) (HEATING),
27 Manage (HANDLE) one of those on the door of nightclub, for one (HANDLE),
28 Wash your mouth out (GARGLE) with local drink (GARGLE),
32 Detained missing Dane (‘detained’ missing ‘Dane’ = etid = EDIT) with job on the paper (EDIT),
33 Foes and nuisances scandalising leader’s (‘foes and nuisances scandalising’ leaders = FANS) supporters (FANS).