Related Clues:

• Do an after-school chore
• One way to remove marginalia
• Delete, as a file
• Zero out
• Remove entirely
• Eliminate, in a way
• Remove with rubber
• Do a detention chore
• It's hard to do with ink
• Remove, as errors
• Help the teacher, perhaps
• Clear from memory
• Clear tape
• Wipe the blackboard
• Backspace, perhaps