Shakespeare actor reveals plot (4)
I believe the answer is:
area
'plot' is the definition.
(I've seen this before)
'shakespeare actor reveals' is the wordplay.
'reveals' indicates a hidden word.
'AREA' is hidden in the letters of 'shakespeare actor'.
(Other definitions for area that I've seen before include "land" , "field of study" , "Locality" , "Expanse or neighbourhood" , "Field of activity or surface" .)