Barrier against burrowers (4)
I believe the answer is:
mesh
(Other definitions for mesh that I've seen before include "Work well together" , "Engage; net" , "Piece of netting" , "Interweave - netting" , "Undeviating" .)
I believe the answer is:
mesh
(Other definitions for mesh that I've seen before include "Work well together" , "Engage; net" , "Piece of netting" , "Interweave - netting" , "Undeviating" .)