Jungle vine (5)
I believe the answer is:
liana
'jungle vine' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for liana that I've seen before include "Woody climbing (usually tropical) plant" , "Jungle climber" , "Climbing jungle plant" , "Climbing-plant" , "Woody climbing tropical plant -- a nail (anag)" .)