JIG' The crossword solution for the term 'Puzzle Piece' is 'JIG'. A JIG is a type of puzzle piece that is used to create a specific shape or form. It is typically made of wood and has a series of notches, slots, and holes that allow it to fit together with other pieces. Jigs are commonly used in carpentry and other woodworking projects. They can also be used to assemble metal parts, such as those used in automotive manufacturing.