1: Later round without an opponent (3)
3: A drain could be at the bottom (5)
6: Go-go artist Rivera (5)
9: Smells renovated doors (5)
10: A number going to church for fish (5)
11: Its a firm, small lettuce (3)
12: Surer rate confused Washington money maker (9)
15: Plunges about in State's evidence (5)
16: Stir outspoken 3-down resident, usually (5)
18: Central Slovak airport damaged 16-down (9)
20: Capital investment producing hard faces (9)
21: Dizzy Ben is a playwright (5)
22: April keeps providing material for a poet (5)
23: Wrong, or sure one is wrong (9)
25: Polygraph unexpectedly traps vandal (3)
26: Keeps, in vases, bananas (5)
28: Level called for salary increase (5)
29: Twice French mounted plain bovines (5)
30: Lightened up, taking part in strip-tease dance (5)
31: Take Chair in university (3)