Indian credit notes (4)
I believe the answer is:
cree
'indian' is the definition.
(Cree is an example)
'credit notes' is the wordplay.
'credit' becomes 'cr'.
'notes' becomes 'ee' (**).
'cr'+'ee'='CREE'
(Other definitions for cree that I've seen before include "tribesman" , "American Indians" , "Soften up" , "Native American; rhymes with French cheese" , "tribe" .)