Related Clues:

• Observation
• Discovery
• Detection
• The act of spying
• First glance
• Act of keeping watch
• Observing one in a slip up
• One lapse, possibly, in observation
• Discovery means plea is changed
• I slip back outside for a look
• Rising error engulfing one results in notice
• Mess up finally, seeing nothing odd in secret observation
• I'm involved in slip-up in surveillance
• Secret observation
• Detection using sixth sense at first impressed all lookers-on