Hollywood workplaces (4)
I believe the answer is:
sets
'hollywood workplaces' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sets that I've seen before include "Scenery etc. of 11 across productions" , "Scenery etc. of dramatic productions" , "Classes" , "Hardens" , "Solidifies" .)