Conflict can be hell with my daughter (7)
I believe the answer is:
discord
'conflict' is the definition.
(discord is a kind of conflict)
'hell with my daughter' is the wordplay.
'hell' becomes 'dis' (I've seen this in other clues).
'with' means one lot of letters go next to another.
'my' becomes 'cor' (I've seen this in other clues).
'daughter' becomes 'd'.
'dis'+'cor'+'d'='DISCORD'
'can be' is the link.
(Other definitions for discord that I've seen before include "Dissension" , "Friction" , "Strife, lack of harmony" , "Opposition" , "Lack of agreement" .)