The —, 1902 piano rag by Scott Joplin used as the theme song for 1973 comedy-drama film The Sting (11)
I believe the answer is:
entertainer
(Other definitions for entertainer that I've seen before include "he may have a stage career?" , "Eg, singer or comic" , "One in showbusiness" , "Provider of amusement" , "Performer" .)