Film segment
I think it could be either:
'film segment' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for clip that I've seen before include "Shorten" , "One holding together < trim" , "Cutting" , "Short piece of film" , "Magazine" .)
'film segment' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for reel that I've seen before include "Stagger with rod winder" , "Highland dance" , "wind-up?" , "Dance; winding drum" , "Something to fish with" .)