Protest as daughter gets posted (7)
I believe the answer is:
dissent
'protest' is the definition.
('dissent' can be a synonym of 'protest')
'daughter gets posted' is the wordplay.
'daughter' becomes 'dis' (I've seen this in other clues).
'gets' means one lot of letters go next to another.
'posted' becomes 'sent' ('send' can be a synonym of 'post').
'dis'+'sent'='DISSENT'
'as' is the link.
(Other definitions for dissent that I've seen before include "Disagree" , "Dispute" , "Open disagreement" , "Difference of opinion - snidest (anag)" , "Express a different opinion" .)