Drama about a zoo keeper? (4)
I believe the answer is:
noah
'zoo keeper?' is the definition.
(I've seen this before)
'drama about a' is the wordplay.
'drama' becomes 'noh' (Noh or No is a Japanese masked drama).
'about' indicates putting letters inside.
'noh' enclosing 'a' is 'NOAH'.
(Other definitions for noah that I've seen before include "First collector of animals?" , "Sailor who ran aground on Mount Ararat" , "Old ship builder" , "Biblical arkwright" , "He built an ark" .)