Just a few to finish off: 6d Seaweed needs a supplier of water (5) N?R?A 17d Call Tea up! (7) C?A?A?E Why is it CHARADE? 18d About to be given heavy stick, supplying fruit baskets (7) C?L?T?I
1I think 7d is not charade.
I prefer chamade. tea=cha , Call of "tea up" is "cha made!".
Chamade means "A signal made for a parley by beat of a drum. "