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' (eg 'when I walked' means 'as I walked').
'returning' says the letters should be written backwards.
'with' says to put letters next to each other.
'money' becomes 'tin' (old-fashioned slang term for money).
'as' backwards is '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" .)