Related Clues:

• First-class men required as spies
• A toilet for spies
• Spies needing information held by ATS
• A note sent out by representatives
• Reps need a loo
• A convenience for go-betweens
• Middlemen: one has knowledge that reaches backstreet
• They don't mind their own business
• They may be after estate — amen!
• Spies where George Michael cruised?
• Those answering to M answer to men
• Smart and 99: Abbr
• CIA workers
• "Men in Black" figures
• Cadillac model unveiled in 2012