Related Clues:

• Open to defeat
• Take back part of the sound of silence
• Prepare for take-off?
• Wreck's sunk into ground, obviously
• Ruin in being found out
• Unfasten - destroy
• Unfasten - ruin
• Destroy - nullify
• Dissolve - ruin
• Repeal
• Dismantle - destroy
• Release button, knot etc
• Cancel - ruin
• Revert
• Cancel - destroy