Doing a cameo is a term used to describe a brief appearance of a famous person in a movie, television show, or other form of media. The term can be broken down into three crossword solutions: EMBOSS (6 letters), CARVE (5 letters), and ONYX (4 letters). Embossing is the process of creating a raised design on a surface, such as a stamp or seal. Carving is the act of cutting or sculpting something, usually out of wood or stone. ONYX is a type of black gemstone that is often used in jewelry. Together, these three words represent the idea of doing a cameo, which is a brief but memorable appearance.