Related Clues:

• Ultra-secret org.
• Org. in 'Patriot Games'
• Hush-hush grp.
• 'The Puzzle Palace' grp.
• 'Alias' org.
• Bush Sr.'s bailiwick, 1976-77
• Code-cracking org.
• Codebreakers' org.
• Operative's employer
• Kind of operation
• Decryption org.
• Snoop gp.
• Org. in Langley, Va.
• Intelligence org.
• OSS successor