Set point in play! Hurry up! (4,2,2)
I believe the answer is:
step on it
'hurry up' is the definition.
'set point in play' is the wordplay.
'in play' indicates an anagram.
'set'+'point'='setpoint'
'setpoint' with letters rearranged gives 'STEP ON IT'.
(Other definitions for step on it that I've seen before include "Hurry! - set point (anag)" , "Get a move on!" , "Be quick" , "to take advantage of escalating opportunity" , "Go for speed" .)