The crossword solution for the term PIN CUSHION is MAT, which is a three-letter word. A pin cushion is a small cushion filled with soft material, such as cotton or wool, and used to store pins and needles. It is often decorated with fabric and can be used as a decorative item. Pin cushions are commonly used by sewers, tailors, and other needleworkers to keep their pins and needles organized and easily accessible.