Icy layer (4)
I believe the answer is:
rime
(Other definitions for rime that I've seen before include "Hoarfrost" , "Kind of frost in mire" , "''The ... of the Ancient Mariner'' (Coleridge)" , "Type of frost" , "dated poetry" .)
I believe the answer is:
rime
(Other definitions for rime that I've seen before include "Hoarfrost" , "Kind of frost in mire" , "''The ... of the Ancient Mariner'' (Coleridge)" , "Type of frost" , "dated poetry" .)