Across
5 athlete THE LATE (anag)
9 gauze GA<(wo)U(nd)>ZE
10 authentic AU + THEN + CT/I (anag)
11 sweatshops (haples)S/(fello)W + EATS + POSH (anag)
14 Terpsichore PRIEST (anag) + CHORE [Muse of dance]
18 clandestine CLAN + DESTINE
21 ring double def
22 initiators 1/NIT/1 + ROAST (anag)
25 fat chance relieF AT CHANCEllor (hidden)
26 irate (p)IRATE
27 licence NICE CL(u)E (anag)
28 Hasidim H(ate)/A(llowing) + MIDIS (rev)
Down
1 ingest in jest (hom)
2 amused A<MUSE>D
3 ineptitude (p)E(P)TIT in 1/NUDE
4,12,23 gnash one’s teeth HONEST in HE’S A GENT (anag)
5 antipasti T(rout) in IT’S A PAIN (anag)
6 heel EH! (rev) + EL
7 extensor E(xercise)/X/TEN/SO/R(ight)
8 encashed EN<(Johnny)CASH/(becam)E>D
13 schematics SCH(ool) + TEAM (anag) + (p)I(e)C(e)S
16 scornful S(evere)/C(ases)/O(f)/R(ampant)/N(ew) + FLU (anag)
17,15,1across magnetic resonance imaging
MAGNETIC + SCENARIO MEN (anag) + AGING
19,24 now and then double def
20esteemESTEE (Lauder) + M(ascara)