Some credit card rewards (5)
I believe the answer is:
miles
'some credit card rewards' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for miles that I've seen before include "Imperial units of length" , "'But I have promises to keep, and . . . . . to go before I sleep' (Frost)" , "Distance units" , "a long way" .)