Post-WWII alliance (4)

I believe the answer is:

nato

'post-wwii alliance' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for nato that I've seen before include "Atlantic alliance (abbr.)" , "Military organization" , "N. Atlantic alliance" , "Security agreement" , "Western mil. alliance" .)

I've seen this clue in the USA Today, the Newsday, the LA Times and the King Feature Syndicate.

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