Musician changed into rags (8)
I believe the answer is:
organist
'musician' is the definition.
(organist is a kind of musician)
'changed into rags' is the wordplay.
'changed' is an anagram indicator.
'into'+'rags'='intorags'
'intorags' is an anagram of 'ORGANIST'.
(Other definitions for organist that I've seen before include "Cathedral musician" , "Church instr. player" , "One plays in church usually" , "Accompanist, keyboard player" , "It groans for church musician" .)