American composer died in prison? (5)
I believe the answer is:
caged
'in prison?' is the definition.
(caged can mean imprisoned)
'american composer died' is the wordplay.
'american composer' becomes 'cage' (I've seen this in another clue).
'died' becomes 'd' (abbreviation next to the year of someone's death).
'cage'+'d'='CAGED'
(Other definitions for caged that I've seen before include "in prison" , "Cooped up" , "In a zoo?" , "Shut up" , "Confined behind bars" .)