Gave back (6)
I believe the answer is:
repaid
'gave back' is the definition.
('repay' can be a synonym of 'give back')
This is the entire clue.
(Other definitions for repaid that I've seen before include "Refunded or rewarded" , "Returned" , "Reimbursed" , "Compensated" , "Diaper (anag.)" .)