Follow – stem (5)
I believe the answer is:
stalk
This clue is a double definition.
'follow' is the first definition.
(I know that stalk is a more specific form of follow)
'stem' is the second definition.
(I know that stem can be written as stalk)
(Other definitions for stalk that I've seen before include "Follow prey stealthily" , "Quietly pursue" , "Shadow" , "Stem of plant" , "Stem; pursue stealthily" .)