A hint of money, say, coming back (5)
I believe the answer is:
tinge
'a hint' is the definition.
(I've seen this before)
'money say coming back' is the wordplay.
'money' becomes 'tin' (I've seen this before).
'say' becomes 'eg'.
'coming back' is a reversal indicator.
'eg' written backwards gives 'ge'.
'tin'+'ge'='TINGE'
'of' acts as a link.
(Other definitions for tinge that I've seen before include "Touch (of colour?)" , "A suspicion" , "Slight amount of colour" , "Slight colouring" , "Subdued colour" .)