Bought back and restored oneself to favour (8)
I believe the answer is:
redeemed
'bought back' is the definition.
('redeem' can be a synonym of 'buy back')
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for redeemed that I've seen before include "Restored to favour" , "Made up for; bought back" , "Recovered possession - paid back" , "Bought out of pawn" , "Bought back from pawnbroker" .)