The term 'PART OF A HAND' can be represented by three different solutions in a crossword puzzle: CLAP (4 letters), KNUCKLE (7 letters), and CARD (4 letters). Clapping is a common gesture used to express joy or appreciation, and it involves the palms of the hands coming together. Knuckles are the joints located at the base of the fingers, and they are often used for punching or knocking on a door. Finally, a CARD is an object held in the hand, such as a playing CARD or a business CARD.