Run to get latch (4)
I believe the answer is:
bolt
This clue is a double definition.
'run' is the first definition.
(thesaurus)
'latch' is the second definition.
(thesaurus)
'to get' acts as a link.
(Other definitions for bolt that I've seen before include "Flash of lightening - run away" , "Runner" , "one may be shot" , "Eat (one's food) quickly" , "Fasten - run off - Jamaican sprinter" .)