Related Clues:

• Rule out
• Debar
• Prevent from happening
• Rule out in advance
• Prevent, forestall the possibility of
• 'Prevent, forestall (8)'
• Sounds as if the clue to this was made beforehand
• Make impossible before hundreds walk all over the evidence
• Rule out mention of speed of light in introduction
• Make impossible
• Rule out chapter in introduction
• Make impossible claims at first in introduction
• Make it impossible to get the key into the opening
• In the overture, a note and bar
• Rule out major key in opening music