Fence of bushes (5)
I believe the answer is:
hedge
'fence of bushes' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for hedge that I've seen before include "Qualify by conditions; boundary of bushes" , "Be cautious" , "bush as a > barrier" , "Stall" , "Fence of bushes or small trees" .)