ACROSS
 1. <soft shoe> MOCCASIN = ←(.n)NIS ACCOM(p.)←
 6. QUITS outside O = QUOITS <throwing game>
 9. STILE inside PENCE = PESTILENCE <plague>
10. [-r]ALLY = ALLY <friend>
11. "CAIN" = CANE <punishment>
12. CLOSES HAVE = CLOSE SHAVE <narrow escape>
13. "MAY KIT" = MAKE IT <survive>
15. _P _Y JAM A S = PYJAMAS <night shift?>
17. BI'S ←SORT← = BISTROS <bars>
19. <stiff> CORPSE = COPSE outside R
21. <plots> STRATAGEMS = (TARGET MASS)*
23. <awful experience> MARE <somewhere on the Moon>
25. <gripe> CARP = CA RP
26. AUSTRALIAN* = SATURNALIA <seven-day festival>
27. <pointillist> SEURAT = S_E U_R A_T
28. SO P ←SONAR← = SOPRANOS <voices>

DOWN
 2. <Greel character> OMEGA = ←A GEM O←
 3. T inside CASE _Y _E = CAT'S EYE <motorists' guide>
 4. LICIT inside ←ROOS← = SOLICITOR <lawyer>
 5. <crazy> NON COMPOS MENTIS = NEPOTISM* inside NONCOMS
 6. QUE outside EU = QUEUE <hairstyle>
 7. (MAN WHO I)* = ON A WHIM <for no particular reason>
 8. <puts on> TELEVISES = LEVIS inside TEES
14. <determine> ARBITRATE = _AR_ BITRATE
16. J_ ⭯SOCK⭯ ←PART← = JOCKSTRAP <athletic underwear>
18. <get lost> SCARPER = (.t)S CAR PER(h.)
20. RUMBA B_ A = RUM BABA <cake>
22. <useful skill> ASSET = AS SET
24. <horny brute> RHINO = "WRY" NO