Resented, but moved to accept as right (9)
I believe the answer is:
begrudged
'resented' is the definition.
('begrudge' can be a synonym of 'resent')
'moved to accept as right' is the wordplay.
'moved' becomes 'budged' (budging is a kind of moving).
'to accept' is an insertion indicator.
'as' becomes 'eg' (I've seen this in other clues).
'right' becomes 'R' (common abbreviation).
'eg'+'r'='egr'
'budged' placed around 'egr' is 'BEGRUDGED'.
'but' acts as a link.
(Other definitions for begrudged that I've seen before include "Envied, was jealous of another's good fortune" , "Resented another's success" , "Given resentfully" .)