1: Thus might florin study a silly timekeeper (3-3,5)
7: One final, huge Greek goddess (3)
9: Carrier's gotta be upset (4,3)
10: Note found in prison is swell (5)
11: The ultimate in tepee doctrine (5)
13: Bird's cautious after officer captures donkey (9)
14: Arcking shot from Bill O'Brien (3)
16: Everyone in Italy's mad - so it's said - for ice cream (5-6)
18: Playwright rethinking copyright wrangle (4,7)
19: However, you expect trouble at first (3)
20: A standoff for late teams in rivalry (9)
21: Small town, oddly, has room (5)
23: Discover treasure hiding in plain sight (5)
24: Sun god, after climbing once more, falls (7)
27: Worthless even when recycled (3)
28: Lepers treated by North Dakota specialist? Brilliant! (11)