1: Five kills one. (3)

3: Authority, for example (sic) (3-2)

5: Airship loose after opening bombardment (5)

6: Bumped into yours truly at junction (3).

7: Training some smart little monkeys (9)

9: Vet theatre opening 8-down (3)

10: Lug worm finally being a symbol (5)

11: A drain could be at the bottom (5)

12: Nothing we have to pay (3)

1: Pathological bumbler holds a record (5)

2: Witty remark, for example, about constant batterer (7)

3: Someone in favour of wine in jolly good surroundings (9)

4: Cull out from top ten (3)

6: Eminent performer in some art form (7)

8: Monsieur is immersed in unspecified French river (5)

9: No one told sister (3)