Related Clues:

• London's ___ Square
• Abba hit
• 1-Across song
• Undoing
• Napoleon was defeated here on June 18, 1815
• Napoleon's downfall
• Where Napoleon lost
• Decisive defeat
• Ignominious end
• Crushing defeat
• ... I'd send English plumbers to ___
• Undoing, figuratively
• 1974 Abba hit
• Decisive downfall
• ABBA's first hit