Cast out parsley? (7)
I believe the answer is:
players
'cast' is the definition.
(I've seen this before)
'out parsley?' is the wordplay.
'out' indicates anagramming the letters.
'parsley' is an anagram of 'PLAYERS'.
(Other definitions for players that I've seen before include "Team members" , "They participate in games" , "cast" , "Musicians" , "Performers" .)