Related Clues:

• Go bad, as milk
• Like grapefruit
• Like lemonade sans sugar
• Become disenchanted
• Making the mouth pucker
• Tart to the taste
• Like sourballs
• Like crab apples
• Bitter to the taste
• Like lemonade
• Peevish, as a puss
• No good, as milk
• Causing the lips to pucker
• Biting, as wit
• Like unripe apples