Play with acts for all the actors! (4)
I believe the answer is:
cast
'all the actors' is the definition.
(I've seen this before)
'play with acts' is the wordplay.
'play with' indicates an anagram (I've seen 'plays with' mean this (I've seen this in other clues)).
'acts' anagrammed gives 'CAST'.
'for' acts as a link.
(Other definitions for cast that I've seen before include "characters together" , "Players < lose" , "Character" , "Throw a fishing line" , "Shed - actors" .)