Related Clues:

• Unmake a sketch
• Wipe a board clean
• Make a blackboard black, say
• Get rid of Republican, keeping quiet about it
• Off the mark?
• Clear from a chalkboard
• Destroy period staircase heartlessly
• Delete periods before end of sentence
• Use the pink part of a pencil
• Sabotage with a magnet, maybe
• Shake an Etch A Sketch, say
• Wipe off a whiteboard
• Clear, as the blackboard
• Dry-___ markers
• Un-write