Rebellious daughter isn't concealing viewpoint (9)
I believe the answer is:
dissident
'rebellious' is the definition.
(dissident means rebellious or mutinous)
'daughter isn't concealing viewpoint' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'concealing' indicates putting letters inside.
'viewpoint' becomes 'side' (I've seen this in another clue).
'isnt' placed around 'side' is 'issident'.
'd'+'issident'='DISSIDENT'
(Other definitions for dissident that I've seen before include "Opposer of officialdom" , "One opposing official policy" , "Insets did for one who opposes authority" , "Opposer of official line" , "Political nonconformist" .)