Related Clues:

• Completely demagnetize, say
• Job for the board?
• Not leave one's mark
• Use the unleaded part
• Demagnetize, maybe
• Rub out with rubber, e.g.
• Use the unsharpened end
• Record silence over
• Edit, in a way
• Clean the slate
• Press the backspace
• Clear the whiteboard
• Make disappear
• Clear, as a blackboard
• Strike from the record