Capricious wife always fighting daughter (7)
I believe the answer is:
wayward
'capricious' is the definition.
(I've seen this before)
'wife always fighting daughter' is the wordplay.
'wife' becomes 'w' (abbreviation).
'always' becomes 'ay' (archaic term for 'always').
'fighting' becomes 'war'.
'daughter' becomes 'd' (genealogical abbreviation).
'w'+'ay'+'war'+'d'='WAYWARD'
(Other definitions for wayward that I've seen before include "Unpredictable, wilful" , "Perversely independent" , "Capricious and undisciplined" , "Not obedient or easily controlled" , "Undisciplined, headstrong" .)