Related Clues:

• President's pledge
• Formal promise
• Inauguration feature
• Promising words?
• Inaugural event
• It precedes much testimony
• "I do," for one
• Solemn pronouncement
• Testimony prelude
• Salty retort
• Swearword
• Solemn word
• Solemn statement
• One shouldn't lie under it
• Flies, mice, etc.