Rainforest vine (5)
I believe the answer is:
liana
'rainforest 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 forest climber" , "Jungle creeper" , "Climbing jungle plant" , "Climbing plant of rainforests" , "Climbing-plant" .)