Rebel daughter isn't hosting party (9)
I believe the answer is:
dissident
'rebel' is the definition.
(I've seen this before)
'daughter isn't hosting party' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'hosting' indicates putting letters inside.
'party' becomes 'side' (eg a side or party in a contract).
'isnt' going around 'side' is 'issident'.
'd'+'issident'='DISSIDENT'
(Other definitions for dissident that I've seen before include "Insets did for one who opposes authority" , "Rebel, protestor" , "Person opposing official policy" , "One opposed to official policy" , "Opposer of officialdom" .)