Prima donna who may turn greedy (4)
I believe the answer is:
diva
'prima donna who' is the definition.
'diva' can be an answer for 'prima donna' (synonyms). I'm unsure of the rest of the definition.
'turn greedy' is the wordplay.
'turn' is a reversal indicator.
'greedy' becomes 'avid' (synonyms).
'avid' written backwards gives 'DIVA'.
'may' acts as a link.
Can you help me to learn more?
(Other definitions for diva that I've seen before include "Operatic ego" , "fat lady?" , "Top opera singer" , "Successful lady" , "Callas, say" .)