Forest canopy (8)
I believe the answer is:
treetops
'forest canopy' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for treetops that I've seen before include "Highest points in forest, where babies rockabye?" , "looking down on other branches" , "Highest level of a wood" , "elevated position?" , "Kenyan safari centre - canopy" .)