Race leads to winning approach (3-2)
I believe the answer is:
run-up
'approach' is the definition.
(I know that run-up is a type of approach)
'race leads to winning' is the wordplay.
'race' becomes 'run' (run is a kind of race).
'leads to' is a charade indicator (letters next to each other).
'winning' becomes 'up' (eg being up at half time in football).
'run'+'up'='RUN-UP'
(Other definitions for run-up that I've seen before include "Cricketing approach?" , "Approach - preliminaries" , "Bowler's approach?" , "Preliminary period" .)