Comes to a trail following north and south (7)
I believe the answer is:
awakens
'comes to' is the definition.
(I've seen this in another clue)
'a trail following north and south' is the wordplay.
'trail' becomes 'wake' (I've seen this before).
'following' is a charade indicator (letters next to each other).
'north' becomes 'N' (abbreviation).
'and' means one lot of letters go next to another.
'south' becomes 'S' (abbreviation).
'a'+'wake'+'n'+'s'='AWAKENS'
(Other definitions for awakens that I've seen before include "Rouses (from sleep)" , "Sparks" , "Arouses" .)