Supporter with two sons gives money (5)
I believe the answer is:
brass
'money' is the definition.
(I've seen this before)
'supporter with two sons' is the wordplay.
'two sons' means two substitutions for 'sons'.
'supporter' becomes 'bra' (a bra gives support to breasts).
'with' says to put letters next to each other.
'sons' becomes 's'.
'sons' becomes 's'.
'bra'+'s'+'s'='BRASS'
'gives' is the link.
(Other definitions for brass that I've seen before include "Readies" , "Zinc-copper alloy - cheek" , "Baggage" , "some players!" , "Alloy (associated with muck)" .)