Related Clues:

• Carbonated water
• Popular mixer
• Fizzy fountain fare
• Dark soft drink
• Coke, e.g.
• Fast-food order
• Caffeinated drink
• Jolt, e.g.
• Fast-food drink
• Drink from nuts
• Citrus quaff
• Fountain request
• Fountain order, often
• Ice-cream concoction
• 16-Across, e.g.