Advantage trimming front from bushy boundary (4)
I believe the answer is:
edge
This clue could be a double definition.
'advantage trimming front' is the first definition.
'edge' can be an answer for 'advantage' (having the edge is having an advantage). I am not sure about the 'trimming front' bit.
'bushy boundary' is the second definition.
'edge' can be an answer for 'boundary' (edge is a kind of boundary). I'm not sure about the 'bushy' bit.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for edge that I've seen before include "Periphery" , "Border; intense quality" , "Line where soething begins or ends" , "Cutting side as of knife, or margin" , "Create borders" .)