K, in the NATO alphabet (4)

I believe the answer is:

kilo

'k in the nato alphabet' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for kilo that I've seen before include "Unit of weight (abbr)" , "Metric weight, informally" , "Lewis Carroll heroine" , "possible drugs unit" , "Metrical unit of weight" .)

I've seen this clue in the LA Times and The New York Times.

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