Related Clues:

• See 66-Across
• Bush took it
• Inauguration highlight
• It's sworn at a swearing-in
• Elaborate party
• Charity festivity, e.g.
• Grand celebration
• Affirmation
• Black tie affair
• Festive soiree
• Curse or vow
• Witnesses take one
• It may be solemn
• Hippocratic thing
• Fancy bash