Cut speed (4)
I believe the answer is:
clip
I believe this is a double definition.
'cut' is the first definition.
(clip is a kind of cut)
'speed' is the second definition.
(I've seen this before)
(Other definitions for clip that I've seen before include "Shorten" , "Spring-loaded holder" , "Film segment" , "Short film extract; fasten" , "Cut short; cartridge holder" .)