Young girl in sales made returns (6)
I believe the answer is:
damsel
'young girl' is the definition.
(I've seen this before)
'in sales made returns' is the wordplay.
'in' indicates a hidden word.
'returns' says the letters should be written backwards.
'lesmad' can be found hidden inside 'sales made'.
'lesmad' written backwards gives 'DAMSEL'.
(Other definitions for damsel that I've seen before include "Girl (literary)" , "little fly" , "Medals (anag.)" , "distressed girl?" , "Maiden (poetic)" .)