Related Clues:

• When duelers traditionally met
• Twenty-four hours holiday? Starting when?
• First light ... or a phenomenon suggested by this puzzle's seven sets of circled letters?
• Wake-up time, for some
• Pretty early
• Germany's Dark ___
• Early My Morning Jacket jam?
• The end of night
• When duelers may meet
• When day breaks
• Dawn in 24-hour holiday?
• When an early voyage may start
• Lighting-up time?
• When the sun rises and shines
• Bakery ad broadcast first thing in the morning