Get rid of players on strike (4,3)
I believe the answer is:
cast out
'get rid of' is the definition.
(casting out is a kind of getting rid of)
'players on strike' is the wordplay.
'players' becomes 'cast' (group of actors).
'on strike' becomes 'out' (I've seen this before).
'cast'+'out'='CAST OUT'
(Other definitions for cast out that I've seen before include "Rejected from a group" , "Expelled" , "Expel" .)