1: What this puzzle is (3)
2: Explosive device held by one failed candidate (7)
3: Ephemeral deity guards precious stone (7)
4: Excite mirth in a daughter of Mnemosyne (5)
5: Just desserts for Alpine tumble? (9)
6: A good friend to union, radical is not doing it for money (7)
7: Affair? Despair soon dies, in steps. (7)
8: Privy to accessibility (11)
11: Trashy dime novel about American sex symbol who's not all there? (5,2,4)
14: Shakespeare's maiden begging for kissing (9)
15: Exotic cider as cocktail (7)
16: Norm even had a good time (7)
17: Certainly, Mr. Gore welcoming Republican is bizarre (7)
18: Little bit quiet about Old Dick before the end (7)
21: Discover merit after first lesson (5)
24: Club with space for some money (3)