Related Clues:

• Smallest positive integer
• Single entity
• With 46-Across, phrase on the back of a buck
• Hydrogen's atomic number
• Lunch time, for some
• See 46-Down
• See 82-Across
• Simple ticket order
• Start of a long-distance call
• Lone
• Like-minded
• Indivisible
• January, briefly
• Area code preceder
• Amalgamated