Old coin for aristocrat (5)
I believe the answer is:
noble
I believe this is a double definition.
'old coin' is the first definition.
(I've seen this before)
'aristocrat' is the second definition.
(member of the nobility)
'for' is the link.
(Other definitions for noble that I've seen before include "Honourable ? aristocratic" , "August" , "Lord" , "Titled peer of the realm" , "Illustrious - old money" .)