The term 'Feature of a Shaw Show' can be summarized as the CLARINET, which is an 8-letter word. The CLARINET is a woodwind instrument that is part of the larger family of instruments known as saxophones. It has a single-reed mouthpiece, a cylindrical bore, and a flared bell. It is used in many genres of music, including jazz, classical, and popular music. It is also often featured in musicals and shows written by George Bernard Shaw.