Related Clues:

• Hamilton's note
• X, at times
• Coffee-break time
• Start of a countdown, perhaps
• Mid-morning
• Sum of the first three prime numbers
• Anger management number
• Royal-flush card
• Late dinner time
• What "X" may mean
• Letterman list starter
• Countdown start
• What X may mean
• X, maybe
• Pin near a gutter