Take part in quarrel I should enjoy (6)
I believe the answer is:
relish
'enjoy' is the definition.
('relish' can be a synonym of 'enjoy')
'take part in quarrel i should' is the wordplay.
'take part in' indicates the answer is hidden within the clue.
'RELISH' is hidden in the letters of 'quarrel i should'.
(Other definitions for relish that I've seen before include "savoury stuff" , "Savour an experience" , "Enjoy; piquant sauce" , "Piquant sauce or pickle" , "what might add flavour" .)