Girl from Salem, Massachusetts (4)
I believe the answer is:
emma
'girl' is the definition.
'from salem massachusetts' is the wordplay.
'from' indicates the answer is hidden within the clue.
'EMMA' is hidden within 'salem massachusetts'.
(Other definitions for emma that I've seen before include "J Austen novel" , "Austen character" , "Titled heroine" , "Flaubert's heroine" , "Jane Austen novel and Nelson's lover" .)