Warren Beatty film (4)
I believe the answer is:
reds
'warren beatty film' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for reds that I've seen before include "Colourful communists" , "Scarlet communists" , "Tidies up" , "Scarlet and crimson, say" , "Left-wingers" .)