Reimburse (5)
'reimburse' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for repay that I've seen before include "Settle a score" , "Refund or reward" , "Reimburse" , "Quite old" , "recompense" .)
'reimburse' is the definition.
(I know that reimburse is a more specific form of refund)
This is all the clue.
(Other definitions for refund that I've seen before include "money to be paid back" , "Money returned" , "Give back" , "Cash back" .)