1: Encrusted with crustaceans, with salt stripped out? (9)
3: Nothing changes in reproductive organs (7)
4: Mrs. Roosevelt East, Trim, Oregon (7)
5: Cause of weighty solemnity? (7)
6: Mean to declare how old you are (7)
7: Inspects old radical for a moment (5, 6)
8: Looks like an eyesore, sounds like an eyesore (3)
12: Ruby ran off to marry after a couple of events came to light again (11)
16: End is close, doctor surreptitiously revealed (9)
18: Amassing gold in confidence trick (7)
19: To be groovy, must not be left off. (5, 2)
20: Catholic starts to raise awareness going into public defamation (7)
21: Bar shows low returns after first of the month (7)