Related Clues:

• Brown beverage
• Losing effort?
• Losing cause
• Losing proposition
• 7-Up it isn't
• Drink with fast food
• Fast-food staple
• With 13-Down, they may include taste tests
• Eschew the fat?
• Kind of soda
• Plan to lose
• Burger and fries go-with
• Float's base, maybe
• Bubbly mixer
• It may be decaffeinated