Girl back in Buffalo I videoed (5)
I believe the answer is:
viola
'girl' is the definition.
'back in buffalo i videoed' is the wordplay.
'back' shows that the letters should be reversed in order.
'in' says the answer is hidden in the clue.
'aloiv' is hidden in the letters of 'buffalo i videoed'.
'aloiv' reversed gives 'VIOLA'.
(Other definitions for viola that I've seen before include "Large violin" , "Pansy-like flower" , "Flower -- stringed instrument" , "Alto of the violin family" , "part of Shakespeare" .)