Fair to put notes with coin (6)
I believe the answer is:
decent
'fair' is the definition.
(thesaurus)
'notes with coin' is the wordplay.
'notes' becomes 'de' (two musical notes).
'with' says to put letters next to each other.
'coin' becomes 'cent' (cent is a kind of coin).
'de'+'cent'='DECENT'
'to put' is the link.
(Other definitions for decent that I've seen before include "Fairly good" , "Generous or modest" , "Not immodest, generous" , "Generous and modestly clothed" , "Honourable or modest" .)