Western fruit crop (4)
I believe the answer is:
whip
'crop' is the definition.
(thesaurus)
'western fruit' is the wordplay.
'western' becomes 'w'.
'fruit' becomes 'hip' (I've seen this in other clues).
'w'+'hip'='WHIP'
(Other definitions for whip that I've seen before include "Parliamentary disciplinarian" , "Lash for driving animals" , "Strike with lash or rod" , "Instrument of discipline" , "Beat (cream)" .)