Answer evasively about barrier (5)
I believe the answer is:
hedge
This clue is a double definition.
'answer evasively' is the first definition.
'barrier' is the second definition.
(hedge is a kind of barrier)
'about' is the link.
(Other definitions for hedge that I've seen before include "Prevaricate; boundary" , "Boundary; equivocate" , "Try to avoid answering questions or dealing with issues" , "Minimise risk" , "Fence of bushes or small trees" .)