Follow queue (4)
I believe the answer is:
tail
This clue is a double definition.
'follow' is the first definition.
(both can mean to chase or pursue)
'queue' is the second definition.
(I've seen this before)
(Other definitions for tail that I've seen before include "Flexible part that extends from an animal's rear" , "Shadow" , "Rump" , "part of coat" , "Queue" .)