Speed up (4,2,3,3)
(Other definitions for gallop that I've seen before include "Faster than a canter" , "Log pal in at this pace" , "Fastest run of a horse" , "Fast gait of a horse" , "'Run at a high speed, like a horse (6)'" .)
'speed up' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hasten that I've seen before include "Speed up" , "Be quick to do something" , "Hurry up in old-fashioned way" , "Act or move fast" , "Move quickly" .)
'speed up' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for accelerate that I've seen before include "snowball" , "Quicken" , "Increase speed" , "Go faster" , "Crank up" .)
'speed up' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for step on the gas that I've seen before include "Hurry" , "Drive faster" , "Speed up" .)
'speed up' 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 "Reverend (abbr.)" , "Run (engine) quickly" , "In engine-room speed up" , "Accelerate (abbrev.)" , "Motor rotation, in short" .)