Freeze over (3,2)

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3,2

ice up

'freeze over' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for ice up that I've seen before include "become frozen" , "Completely freeze" , "get coat" .)

I've seen this clue in the Newsday, the Universal, The New York Times, the LA Times and The Sun.

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