Deep crack in a glacier (8)

I believe the answer is:

crevasse

'deep crack in a glacier' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for crevasse that I've seen before include "gap" , "13 in a glacier" , "big split" , "cold break" , "Crack in a mountain slope or a glacier" .)

I've seen this clue in the Irish Times (Simplex), The Irish Times and The Times.

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