Related Clues:
- Demagnetize, maybe
- Rub out with rubber, e.g.
- Use the unsharpened end
- Record silence over
- Edit, in a way
- Hit 'back'
- Clean the slate
- Press the backspace
- Go back a step, in word processing
- Put back the way things were
- Reverse an action
- Clear the whiteboard
- Reverse, as an action
- Word-processor command
- Free of knots