Pucker-inducing is a term used to describe something that causes a person to involuntarily pucker their lips, usually due to a SOUR or TART taste. The crossword solutions for this term are TART (4 letters), LEMONY (6 letters), and SOUR (4 letters). TART refers to a sharp, acidic flavor, while LEMONY has a more subtle citrus flavor. SOUR is a general term for a sharp, acidic taste. All three of these flavors can cause a person to involuntarily pucker their lips.