Surveillance org (3)

I think it could be either:

cia

nsa

(Other definitions for cia that I've seen before include "American organisation for national security" , "US spy bureau" , "US investigative organisation" , "Famous American intelligence agency, advises President" , "Secret service agency of USA" .)

I've seen this clue in the L.A. Times Daily, the Universal, the LA Times, the New York Times, The Washington Post and the Newsday.com.

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