Make go "Vroom!" (3)
I believe the answer is:
rev
'make go vroom' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rev that I've seen before include "One turn of an engine, in short" , "Minister" , "Accelerate (abbrev.)" , "Reverend (abbr.)" , "Motor rotation, in short" .)