How to make a slow horse faster (3,2)
I believe the answer is:
gee up
I'm afraid I can't even guess how this answer relates to the clue.
Can you help me to learn more?
(Other definitions for gee up that I've seen before include "Urge on" , "Command to horse to go faster" , "Hurry up, horse!" , "Hurry along, Dobbin!" , "Get a move on, Dobbin!" .)