Cut short film sample (4)
I believe the answer is:
clip
I believe this is a double definition.
'cut short' is the first definition.
(synonyms)
'film sample' is the second definition.
(I've seen this in another clue)
(Other definitions for clip that I've seen before include "Cartridge container and piece of film" , "Cut short; cartridge holder" , "Film extract; light blow" , "Short piece of film" , "Something that holds things together - cut" .)