Go like an engine (5)
I believe the answer is:
motor
I believe this clue is a double definition.
'go' is the first definition.
(motoring is a kind of going)
'an engine' is the second definition.
(thesaurus)
'like' is the link.
(Other definitions for motor that I've seen before include "Car (informal)" , "Make good progress" , "Travel by car, engine" , "Drive" , "Machine that converts energy into motion" .)