Related Clues:

• Reverse completely
• Remove, as a necktie
• Open up, as shoelaces
• Clear of data
• Remove from the whiteboard
• Control+Z computer command
• Fix a mistake
• Demonstrate fallibility
• Commit character assassination?
• Clear, as a whiteboard
• "Go back!" computer command
• Shake an Etch A Sketch, e.g
• Release setter, maybe, that's no good at all
• Use an ArtGum, say
• Backspace over, say