Related Clues:

• Reverse, as a typo
• Computer correction command
• Open, as a clasp
• Excel or Word function
• Loosen the laces
• Loose, as a lace
• Use the delete key, e.g.
• Loosen a knot
• Reverse command on a computer
• Untie
• Dismantle
• Free from bondage, in a way
• Prepare to take off, perhaps
• Solve a knotty problem?
• Hit 'back'