Annotated solutions for Prize 27,160

Across

1 extramarital LAX RR AT A TIME (anag)

9 Assam AS/S(ex)A(ppeal)M(ilk)

10 gravitate GRA TE

13 blackboard BLACK BOAR + D(aughter)

15,18 face card F(ootball) C(lub)/A/R(ex)/D(iamonds)

19 straight up STRAIGHT + UP

22 uranium m(U)g or c(U)p [U = uranium]

24 know-all K(ing) + NO WALL

25,11 badminton rackets AD/MINTON in BRACKETS

26 Amiss/amiss double def [Kingsley or Martin]

27 bouncy castle BOUNCY + CASTLE

Down

1 easy chair EA CH/AIR

2 Tim Peake TIM E [Time Magazine]

3 Argus A/R(eal)/G(iant) + US

4 Araucaria A ARIA

5 irises 1/RISES

6 aback A/BACK

7 Zagreb Z(orb)A + BERG (rev)

8 decree DEC(ember) + EER (rev)

14 optometry TRY under OP/TOME

16 actualise CASUAL TIE (anag)

17 ignorant IG OR/ANT

18,12 Chubby Checker C(aught) + HUBBY CHECKER

20 Polish (tad)POLISH

21 simian IS MAN 1 (anag &Lit)

23 audio AUDI/0

24 kinda darK IN DArkest (hidden)