Hard-to-please actress (4)
I believe the answer is:
diva
'hard-to-please actress' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for diva that I've seen before include "Successful lady" , "Celebrated female operatic star" , "A female opera singer" , "High-maintenance opera singer?" , "fat lady?" .)