The Sunday Crossword No 3045, Sunday 28 Apr 2019

ACROSS
1   Trained airman and Royal Marine showing solidarity (3,2,3) ARM IN ARM {AIRMAN}*{RM}
5   A kid free from anxiety (2,4) AT EASE {A}{TEASE}
10 Crumpled towel - who'll give a hoot? (5) OWLET*
11 Ginger cake dunked in drink: not a welcoming sign (2,7) NO PARKING {NO{PARKIN}G}
12 Yet Attic's in need of translation for ancient Athens, say (4-5) CITY-STATE*
13 Night before conservationists' do (5) EVENT {EVE}{NT}  Conservationists/NT?
14 Kramer's taken aback, giving notice (6) REMARK <=
15 Surgeon can be seen here and there at play (7) THEATRE*
18 Her tea's simmering, leading to pops in a microwave, say (7) REHEATS*
20 Good (the actor) in 'Wild Rosebushes' (according to the audience) (6) BRIERS (~ briars)
22 Delightful chap on the radio provides penicillin, etc (5) FUNGI (~fun guy)
24 Unfairly bowled, a weak spin on the ball (4,5) WIDE AWAKE {WIDE}{A+WEAK}*
25 Snidely suggest how unmarried couples live fundamentally undermines a truth eternal (9) INSINUATE {IN SIN}{Un...s}{A}{Tr..h}{Et...l}
26 Tonic unopened, almost all of slice discarded: it's one way to serve gin (2,3) ON ICE {tONIC}{s..cE}
27 Wassail not as spirited around start of November; Christmas is when you might bid them welcome (2-4) IN-LAWS {WasSAIL}* over {No...r}
28 In a manner of speaking, sweatier, in a way (2,2,4) AS IT WERE*

DOWN
1   Having let cold in, make amends immediately (2,4) AT ONCE {ATON{C}E}
2   Use force? There are only 20 of them! (4,5) MILK TEETH {MILK}{TEETH}
3   Awkward swot is anorak fan? No-one's told me otherwise (3,2,3,2,1,4) NOT AS FAR AS I KNOW*
4   Rifle spread fire (7) RANSACK {RAN}{SACK}
6   Funny story, flailing a baton after agitato? Me neither (5,3,2,1,4) THREE MEN IN A BOAT {ME+NEITHER}*{A+BATON}*
7   Carroll's lead in a story (5) ALICE {A}{LI{Ca...l}E} &lit
8   This decade, endlessly weightiest (8) EIGHTIES wEIEGHTIESt
9   Cheery, rowdy pub receives penalty regularly (6) UPBEAT {PUB}*{pEnAlTy}
16 'Avert your eyes!': sounds like Romantic painter was full of sorrow (4,5) TURN ASIDE (~ Turner sighed)
17 Wimbledon ace in good shape, one imparts the writing on the wall (8) GRAFFITI {GRAF}{FIT}{1}
19 I don't care who's at fault (2,4) SO WHAT*
20 Wrapped in cotton wool, end up delivering unwelcome information (3,4) BAD NEWS {SW{END}AB}<=
21 Strait-laced, stuck up in cashmere vestment (6) SEVERE [T<=]
23 Alan's confusedly giving description of Alain's vowels (5) NASAL*

GRID