1: Notice French ruler at exam is most dexterous (9)
2: UCLA urea tests involve internationally recognized scientists (9)
3: Aboard a ship is shipping magnate (7)
4: Like a high ranking diplomat's awful ambrosia salad (13)
5: Bomb compartment - note damaged weapon (7)
6: South of France, an African country (5)
8: Ratty cavalier redressed in proper horseman's uniform. (7, 6)
10: The time before the first woman (3)
15: Color orange upset poet something terrible (5,4)
16: Observed, yet seen so poorly (3,4,2)
18: Tavern drink for the auditor, one with access to confidential information (7)
19: Sanctions mailed through fool (7)
20: Kitty's way of saying loudly, 'I hurt'? (5)
21: Short bloke quietly escaped seaweed (3)