Certain evergreen (3)
I believe the answer is:
yew
'certain evergreen' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for yew that I've seen before include "Leaving body" , "Evergreen tree with dark leaves and red berries" , "'Evergreen tree, reddish-brown wood (3)'" , "Common churchyard feature" , "Coniferous tree" .)