Piquance is a term used to describe the combination of sharpness and flavor in food. It is often associated with spicy dishes, as the piquance of a dish can be increased by adding more spices. ZEST is a term used to describe the outermost layer of citrus fruits, which contains essential oils and flavor compounds that can add a zesty flavor to dishes. Therefore, the crossword solutions for the term piquance can be summarized as a combination of sharpness and flavor, often associated with spicy dishes, and the addition of ZEST from citrus fruits to add a zesty flavor.