The term 'Clarinetist Dixieland' refers to a musician who plays the clarinet in a style of jazz music known as Dixieland. The three crossword solutions for this term are Shaw (4 letters), ARTIE (5 letters), and REED (4 letters). Shaw is likely a reference to the famous American composer and bandleader, ARTIE Shaw, who was known for his skillful playing of the clarinet. ARTIE is likely a reference to the American jazz clarinetist, ARTIE Shaw, who was a major influence on the development of Dixieland jazz. Finally, REED is likely a reference to the American jazz clarinetist, Jimmy REED, who was an important figure in the Dixieland jazz scene.