A path to follow (5)
I believe the answer is:
trail
I believe this is a double definition.
'a path' is the first definition.
(trail is a kind of path)
'follow' is the second definition.
(I've seen this before)
'to' acts as a link.
(Other definitions for trail that I've seen before include "Drag behind" , "Mark left where something has passed - follow it" , "Beaten path; be in losing position" , "Straggle" , "Spoor - lag behind" .)