Rough path or track (5)
I believe the answer is:
trail
This clue is a double definition.
'rough path' is the first definition.
(I've seen this before)
'track' is the second definition.
(synonyms)
(Other definitions for trail that I've seen before include "Need to catch up with" , "Straggle" , "Beaten path; track" , "Beaten path; lag" , "Scent or track followed in hunting" .)