Related Clues:

• Arboretum item
• Apple, plum or pear
• Elm, e.g.
• Gallows
• Certain state symbol
• It's bark with no bite
• Minimal order
• Smallest positive integer
• Single entity
• Every family has one
• Hydrogen's atomic number
• Lunch time, for some
• See 46-Down
• See 82-Across
• Simple ticket order