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