Use coupons (6)
I believe the answer is:
redeem
'use coupons' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for redeem that I've seen before include "Get back" , "Save from hell or recover from pawn" , "Buy back from the pawn shop" , "Retrieve from sin or pawnshop" , "Make amends (for)" .)