The crossword solution for the term 'CRIB PIECE' is SLAT, which is a four-letter word. A SLAT is a thin, narrow strip of wood or metal used in a variety of applications, such as in a crib. Slats are typically used to provide support and structure, and can be found in furniture, window blinds, and other items. In the context of a crib, slats are used to form the sides and base of the crib, providing a safe and secure environment for a baby to sleep.