Tree layer (4)
I believe the answer is:
bark
(Other definitions for bark that I've seen before include "Protective covering of woody stems" , "give sharp cry" , "Sailing-ship" , "Canine noise" , "Covering of tree trunk" .)
I believe the answer is:
bark
(Other definitions for bark that I've seen before include "Protective covering of woody stems" , "give sharp cry" , "Sailing-ship" , "Canine noise" , "Covering of tree trunk" .)