Mountain pass never completely icy (3)
I believe the answer is:
'mountain pass' is the definition.
(col is a kind of mountain pass)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for col that I've seen before include "A pass between mountain peaks" , "Officer" , "Lowest point of ridge between two peaks" , "dip?" , "Feature of mountain" .)