Related Clues:

• Philadelphia tourist attraction
• Sour fruit
• Tom Collins ingredient
• 7-Up ingredient
• See 90-Across
• Key pie ingredient?
• Unused
• Breath freshener
• Ade flavor
• Drink garnish
• Lemon's relative
• Welles role in ''The Third Man''
• Business that makes little money
• Sorbet flavor
• Sherbet choice