Zip or zoom (4)
I believe the answer is:
race
This clue is a double definition.
'zip' is the first definition.
(both can mean to move very fast)
'zoom' is the second definition.
(I've seen this in another clue)
(Other definitions for race that I've seen before include "put their skates on" , "Run - competition" , "eg The Oaks" , "Running contest" , "Breed" .)