Parking so men can get round track (5)
I believe the answer is:
spoor
'track' is the definition.
(spoor is a kind of track)
'parking so men can get round' is the wordplay.
'parking' becomes 'p'.
'men' becomes 'or' (I've seen this in other clues).
'can get round' is an insertion indicator.
'so'+'or'='soor'
'p' placed into 'soor' is 'SPOOR'.
(Other definitions for spoor that I've seen before include "Track of wild animal" , "Animal track or scent" , "Animal track, trail" , "Beast's trail" , "24 [TRAIL]" .)