Shoots and arrests (5)
I believe the answer is:
stems
I believe this clue is a double definition.
'shoots' is the first definition.
(I've seen this in another clue)
'arrests' is the second definition.
(I've seen this in another clue)
'and' is the link.
(Other definitions for stems that I've seen before include "Long narrow parts of flowers" , "springs" , "Stops" , "Stalks" , "things growing?" .)