Related Clues:

• Least sweet
• Tangiest
• Maximally sharp
• Most likely to elicit a pucker
• Most sour
• Most lemony
• Most acidic
• Most like rhubarb, flavorwise
• Most pucker-producing
• Most tangy
• Most pucker-inducing
• Most puckery
• Most cutting exam after tell-tale turned up
• Maximally sour-tasting
• Most citrusy