Jazz be hanged! (5)
I believe the answer is:
swing
I believe this is a double definition.
'jazz' is the first definition.
(I know that swing is a type of jazz)
'be hanged' is the second definition.
(thesaurus)
(Other definitions for swing that I've seen before include "jazz music" , "throw a punch" , "Strange wings on a golfer, say" , "Die" , "Jazz-like dance music" .)