Actors in shed (4)
I believe the answer is:
cast
I believe this clue is a double definition.
'actors' is the first definition.
(group of actors)
'shed' is the second definition.
(shed can mean to discard or cast off)
'in' acts as a link.
(Other definitions for cast that I've seen before include "Personnel in a play" , "Shed - actors" , "Character" , "Dramatis personae" , "Allot roles in a play" .)