Related Clues:

• Keep watch secretly, maybe for foreign government
• One who collects secret information as for government
• Person who secretly collects information as for government
• Secret agent of government
• Watch covertly like secret agent
• One gathers information on enemies
• One gathers information surreptitiously
• The W.I. would not get fat with such a hidden enemy
• The agent that's outside 14 down
• That agent need not be a gent
• 'E might see with this that one was an enemy agent
• Is this how the W.I. could make the secret agent thin?
• The sort of agent that might make the W.I. thin
• To get to be so nosey would be enough to make the W.I. thin
• Being in secret service makes the W.I. thin