Stems (6)
I believe the answer is:
stalks
'stems' is the definition.
('stalk' can be a synonym of 'stem')
This is the entire clue.
(Other definitions for stalks that I've seen before include "Hunts" , "Tracks or pursues stealthily" , "Shadows with plant stems" , "Main stems of plants" , "Follows stealthily with evil intent" .)