Tall woody plants (5)
I believe the answer is:
trees
'tall woody plants' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for trees that I've seen before include "Elms, pines etc" , "Large plants" , "Steer into the plants" , "''I see ... of green / Red roses too'' (What a Wonderful World)" , "Elders perhaps" .)