Related Clues:

• It loses zest as it gets old
• Filmgoer's drink
• Teetotaler's selection, perhaps
• Slice, say
• Bubbly buy
• Bicarbonate of ___
• Root-beer alternative
• Mixer option
• Pop for a meal?
• Fizzy soft drink
• Cherry __
• Pop in the mouth?
• 27-Across, e.g.
• Concession stand purchase
• Vodka mixer