Arctic ice mass, for short (4)

I believe the answer is:

berg

(Other definitions for berg that I've seen before include "South African hill - Austrian composer" , "Shipping hazard; composer" , "Viennese composer" , "Alban -, composer (Wozzeck, Lulu)" , "Mountain; Alban --, composer" .)

I've seen this clue in the Newsday.

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