Money made by son wearing women’s clothing (5)
I believe the answer is:
'money' is the definition.
(I've seen this before)
'son wearing women's clothing' is the wordplay.
I cannot quite understand how this works, but
'son' could be 'ss' (I've seen this in other clues) and 'ss' is present in the answer.
'clothing' could be 'bra' (bra is a kind of clothing) and 'bra' is found within the answer.
No letters remain.
This explanation may well be incorrect...
'made by' is the link.
Can you help me to learn more?
(Other definitions for brass that I've seen before include "Gall" , "Alloy of copper and zinc" , "Alloy; effrontery" , "Money - cheek!" , "One making a living from tricks" .)