Follow, in the end (4)
I believe the answer is:
tail
I believe this clue is a double definition.
'follow' is the first definition.
(thesaurus)
'the end' is the second definition.
(tail is a kind of end)
'in' is the link.
(Other definitions for tail that I've seen before include "Caudal fin" , "Follow; end part" , "Hindmost part" , "Follow - rear part of aeroplane" , "Follow closely - taper (off)" .)