Covert org (3)

I think it could be either:

Which length description are you looking for?:

cia

(Other definitions for cia that I've seen before include "American secret service agency" , "American secret service organisation" , "Famous intelligence agency in US" , "Famous American intelligence agency, advises President" , "American agency concerned with Intelligence" .)

I've seen this clue in the King Feature Syndicate, The New York Times and the Universal.

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