Related Clues:

• Single entity
• Hydrogen's atomic number
• Lunch time, for some
• See 46-Down
• See 82-Across
• Simple ticket order
• Start of a long-distance call
• Like-minded
• Indivisible
• January, briefly
• Area code preceder
• Amalgamated
• Something to grow on?
• Binary system element
• '___ Fine Day' (1963 Chiffons hit)