Related Clues:

• Ctrl-Z command
• "Reverse that" command
• Open University refusal to admit daughter
• Open with part of Nessun dorma
• Record by that man, old song
• Ctrl Z, on a PC
• Computer command after a mistake
• Computer's "reverse" action
• Counterclockwise arrow icon
• Assistance in a time of need
• Reverse the effect of
• Turn back the hands of time after a boo-boo
• Cancel, as a command
• Bring to ruin: loosen
• Gun dog bounds off, free