Crossword Genius

Most frigid (6)

Ross

I believe the answer is:

iciest

'most frigid' is the definition.
('icy' can be a synonym of 'frigid')

This is all the clue.

(Other definitions for iciest that I've seen before include "with minimal friendliness" , "Most cold and frozen" , "Most slippery" , "Most cold and frosty" , "Most reserved" .)

I've seen this clue in the New York Times, the King Feature Syndicate, the USA Today, The Star Tribune, the Penny Press, the L.A. Times Daily, the Universal and The Washington Post.
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