Taking part in quarrel is hindering enjoyment (6)
I believe the answer is:
relish
'enjoyment' is the definition.
(I know that relish is a type of enjoyment)
'taking part in quarrel is hindering' is the wordplay.
'taking part in' indicates a hidden word.
'RELISH' is hidden within 'quarrel is hindering'.
(Other definitions for relish that I've seen before include "Sauce or flavouring" , "Thoroughly enjoy" , "Greatly enjoy; pickle" , "Really enjoy" , "fancy" .)