Girl seen in Oregon or Massachusetts (5)
I believe the answer is:
norma
'girl' is the definition.
'in oregon or massachusetts' is the wordplay.
'in' indicates the answer is hidden within the clue.
'NORMA' can be found hidden inside 'oregon or massachusetts'.
'seen' acts as a link.
(Other definitions for norma that I've seen before include "John Major's wife - Bellini opera" , "Bellini heroine" , "Operatic work" , "Female" , "Manor (anag.)" .)