Quickly make approach (3-2)
I believe the answer is:
run-up
This clue is a double definition.
'quickly make' is the first definition.
(I've seen this before)
'approach' is the second definition.
(I've seen this before)
(Other definitions for run-up that I've seen before include "Preliminary period" , "Bowler's approach?" , "Approach - preliminaries" , "Cricketing approach?" .)