A character piece is a type of musical composition that focuses on the expression of a single character or emotion. The two crossword solutions for this term are 'TRAIT' (5 letters) and 'PROP' (4 letters). TRAIT is defined as a distinguishing quality or characteristic, while PROP is defined as an object used on stage or in a film to help support the story. Both of these words can be used to describe a character piece, as they both refer to elements that help to define a character or emotion.