Signature Piece is a term used to describe a work of art or literature that is particularly meaningful to its creator. It can also refer to a piece of work that has become iconic or representative of the artist's style. In this crossword, BIC and PEN are the solutions for the term Signature Piece. BIC stands for 'Ballpoint Ink Cartridge' and is a type of PEN that uses a replaceable ink cartridge. PEN stands for 'PEN' and is a writing instrument used to apply ink to a surface. Both BIC and PEN are commonly used to create signature pieces of artwork or literature.