Wayward ice (4)
I believe the answer is:
berg
'wayward ice' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for berg that I've seen before include "Mountain; Alban --, composer" , "Mountain (in German, South African)" , "South African mountain - Austrian composer" , "Shipping hazard; composer" , "Austrian composer of 12-tone music, d. 1935" .)