Ridge of drifted sand (4)
I believe the answer is:
dune
(Other definitions for dune that I've seen before include "Sandy hill" , "Coastal sand hill" , "Nude in the sand" , "Ridge of sand created by wind" , "Seashore sand hill" .)
I believe the answer is:
dune
(Other definitions for dune that I've seen before include "Sandy hill" , "Coastal sand hill" , "Nude in the sand" , "Ridge of sand created by wind" , "Seashore sand hill" .)