Related Clues:

• Got rid of marks
• Cleared the board
• Cleaned, as a blackboard
• Helped with the blackboard
• Bleeped out
• Neatened (up)
• Wiped off
• Spruced (up)
• Off the board
• No longer on tape
• Wiped off the blackboard
• Now blank
• When data's been ___ ...
• Completely obliterated
• Shook an Etch A Sketch