1: Visual quirk set in stone. (7)
3: Surprisingly, neither was in place. (7)
6: How a diver might marry (4,3,6)
8: Reed heard veggies may come in them (5)
9: Persistently ask for one silly prom song (9)
12: Beats Greek bread, Mr. Buchanan! (7)
14: Top teams try VISA out (7)
15: Arabs lost sneaky bird (9)
16: Pygmy antelope or Nile wader without a tail (5)
17: Ball-horses are travellers! (5-8)
20: Where nurses work progressively (7)
21: Spotted by a large number - church interior (7)