1: A hint for the snooker champ? (3)
3: Oscillating crystal perhaps not so rare (9)
8: Everlasting variety for Peter and Paul (9)
10: Short time for the Irish (5)
12: Polygraph unexpectedly traps vandal (3)
13: In the act an organ is brought forth (9)
15: Retro gents in exotic parks (5)
16: Model spoken about is reserved (5)
17: One fowl and yet two foul (9)
18: Frost to cover the cake (3)
19: Polyamide used by many Londoners (5)
20: Englishman opening a can to dine at home (3,2)
22: Strait men may be strict disciplinarians (9)
24: Corpse apt to turn up in science fiction (5)
26: Uncommon fly on rare plant (5,4)
27: Arcking shot from Bill O'Brien (3)