Solving time, 21 mins
* = anagram
ACROSS
1 PANTOGRAPH (Hang pop art)*
9 MAY O
10 MALIGN (a gremlin)* less re
11 LIGHT (P) EN
12 BENE (been)* F ACTRESSES
14 SLIDER (idlers)*
16 NOT ICE
19 SLEEPLESS NIGHT (Gent is helpless)*
22 A POST ATE (Greek mythology)
24 I’D LE(e)RS
25 D RAT
26 EXACTITUDE X (kiss) in (date cutie)*
DOWN
1 BAGATELLES (A table leg’s)*
2 A (GEN) DA
3 SHA (has)* GREEN
5 HYDE “Hide” P ARK
7 TA I L END
8 (b)ALLOTS
13 S (A C CHAR) IDE
15 REP LACED
17 TR(y) IOLET (Eliot)*
18 HELEN A Helen of Troy and Paris – capital of US State, Montana
20 ER SAT Z
21 SH (I IT) E Good surface
Thanks again NMSINDY. The & lit at 10 was a recycyled Azed first prize from way back. I am getting worried about how few people solve this puzzle, given the number of prizes won by PD Watts of Abingdon and Michael Hannon of Sheffield. So — you lot — if you want some Oxford reference books …