Hair fastener (4)
'hair fastener' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for clip that I've seen before include "Film extract; rapid pace" , "Film segment" , "Cut - piece of film" , "Short film extract; fasten" , "Film excerpt" .)
(Other definitions for lock that I've seen before include "Strand of hair" , "Bolt" , "Secure - position in rugby team" , "Mechanism to keep closed, door say" , "section of canal" .)