Related Clues:

• OSS successor
• FBI ally
• Former OSS
• It's known for its intelligence
• Bug group?: Abbr.
• Jack Ryan's employer (Abbr.)
• Fed. hush-hush group
• OSS follower
• See 59-Down
• Spying org.
• Org. in "Patriot Games"
• Govt. code crackers
• 'Enemy of the State' org.
• U.S. code and cipher grp.
• Largest U.S. employer of mathematicians