Film snippet (4)
I believe the answer is:
clip
'film snippet' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for clip that I've seen before include "One holding together < trim" , "Something that holds things together - cut" , "Cartridge container and piece of film" , "Trim the catridge container?" , "Spring-loaded holder" .)