Related Clues:

• Loosen, as a necktie
• Word processor's "Cancel that last step"
• "Whatcha __?"
• Word-processor function
• Menu option sometimes desperately clicked
• Open, as shoelaces
• Cause the downfall of
• Free from fasteners
• Microsoft Word command
• "Go back," in word processing
• 'Go back,' in word processing
• Editing menu option
• ''I didn't mean to delete that'' command
• Ctrl + z
• Backspace, perhaps