Related Clues:

• Degauss a tape
• Clean the chalkboard
• Wipe the board
• Open, as a knot
• Wipe the chalk from
• Wipe the slate
• Sudoku solvers often do it
• Remove, as wrapping
• Clear away
• Editing command
• Blank out
• Completely demagnetize, e.g.
• Wipe the board, e.g.
• Open, as knots
• Do away with, in a way