Coins that make a difference (6)
I believe the answer is:
change
This clue is a triple definition!
'coins' is the first definition.
(I've seen this in other clues)
'that make' is the second definition.
(thesaurus)
'a difference' is the third definition.
(I know that change is a type of difference)
(Other definitions for change that I've seen before include "Alter the money returned" , "Innovation" , "Alter, modify" , "It's said to be as good as a rest" , "They say it's as good as a rest" .)