When returning with money to get the material (5)
I believe the answer is:
satin
'the material' is the definition.
(satin is a kind of material)
'when returning with money' is the wordplay.
'when' becomes 'as'.
'returning' shows that the letters should be reversed in order.
'with money' becomes 'tin' (I've seen this in other clues).
'as' written backwards gives 'sa'.
'sa'+'tin'='SATIN'
'to get' is the link.
(Other definitions for satin that I've seen before include "Shiny solk" , "Silky material" , "Fine material" , "Smooth and silky" , "Lustrous fabric" .)