Related Clues:

• Sandwich side
• See 43-Across
• What 7-Up isn't
• Brown beverage
• 7-Up it isn't
• Drink with fast food
• Fast-food staple
• With 13-Down, they may include taste tests
• Robin Goodfellow, e.g.
• Burger and fries go-with
• Float's base, maybe
• Bubbly mixer
• It may be decaffeinated
• Fizzy quaff
• It's in Cuba libre