Related Clues:

• Informer, maybe
• 'Killing Eve' occupation
• Mata Hari or Juni Cortez
• Sleeper agent, e.g
• Agent P's job on "Phineas and Ferb"
• John le Carré figure
• Eve in "Killing Eve," for one
• Plant, for one
• Do some CIA work
• "___ vs. ___" (MAD Magazine strip)
• Person seeking intelligence
• "___ vs
• "___ vs. ___" (MAD Magazine comic)
• Either side of a Mad magazine battle
• Perry the Platypus is one