Composer Joplin (5)
I believe the answer is:
scott
'composer joplin' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for scott that I've seen before include "old novelist" , "Sir Walter --, writer" , "Polar explorer" , "He died leading Antarctic expedition" , "Sir Walter -, author of Guy Mannering" .)