The crossword solution for the term 'Bit of Lettuce' is LEAF. A LEAF is a type of plant organ that is typically flat and thin, and is usually green in color. Leaves are an important part of a plant's life cycle, as they are responsible for photosynthesis, which is the process by which plants convert light energy into chemical energy. Leaves also provide protection from the elements and help to regulate the temperature of the plant. Lettuce is a type of leafy green vegetable that is commonly used in salads and other dishes.