Relative wasting American's money (4)
I believe the answer is:
coin
'money' is the definition.
(coin is a type of money)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for coin that I've seen before include "Create (phrase); metal token" , "Invent (a new word)" , "Invent (a new phrase)" , "Metal used as money" , "Penny, say?" .)