Related Clues:

• Was on a stakeout
• Heeded
• Got an earful
• Acted as a mole
• Dug around, like a mole
• Worked for CSIS
• Worked undercover
• Watched furtively, with "on"
• Watched surreptitiously
• Watched secretly
• Seen
• Entered the Bond trade?
• Emulated Bond
• Eavesdropped, perhaps
• Peeked through a keyhole