"The Liberty Bell" composer (5)
I believe the answer is:
sousa
'the liberty bell composer' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sousa that I've seen before include "US march king" , "Composer of "The Stars and Stripes Forever"" , "John Philip ..., composer of military marches" , "John Philip ---, US bandmaster" , "he produced the Washington Post" .)