Fell trees
I believe the answer is:
hew
'fell trees' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hew that I've seen before include "Chop (wood)" , "Carve with axe" , "Chop or hack at" , "'Cut, fell or shape (3)'" , "Chop; sounds like colour" .)