Of oaks and elms etc (8)

I believe the answer is:

arboreal

(Other definitions for arboreal that I've seen before include "high living" , "Wooded" , "Pertaining to trees" , "found in 20 [TREETOP] ?" , "Relating to trees" .)

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.