Girl's name I found in women's magazine (6)
I believe the answer is:
nellie
'girl's' is the definition.
'name i found in women's magazine' is the wordplay.
'name' becomes 'n' (common abbreviation e.g. on forms).
'found in' is an insertion indicator.
'women's magazine' becomes 'elle' (I've seen this in another clue).
'i' placed into 'elle' is 'ellie'.
'n'+'ellie'='NELLIE'
(Other definitions for nellie that I've seen before include "Elephant in a song" , "See 6" , "'There's an old mill by the stream,......Dean'" , "Dame -- Melba, singer" , "'There's an old mill by the stream, . . . . . . Dean'" .)