Search all the players before a session (4,5)
I believe the answer is:
'search' is the definition.
(I know that cast about has the is a more specific form of the action search)
'all the players before a session' is the wordplay.
'all the players' becomes 'cast' (group of actors).
'before' says to put letters next to each other.
'session' becomes 'bout'.
(Other definitions for cast about that I've seen before include "Search far and wide" , "make a search" .)