For coppers, perhaps, it's something new (6)
I believe the answer is:
change
'for coppers' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for change that I've seen before include "Alter for small coins" , "Best not to do it in 12" , "Redesign" , "Alter with loose coins" , "Little pieces" .)