"Top Gun" moniker (6)

I believe the answer is:

iceman

(Other definitions for iceman that I've seen before include "Person with frozen wares" , "Eugene O'Neill's figure of 'death' (the one who cometh!)" , "eugene o'neill play'the......cometh'" , "Professional killer (US slang)" , "assassin" .)

I've seen this clue in the LA Times.

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