Musician given awful roasting (8)
I believe the answer is:
organist
'musician' is the definition.
(organist is a kind of musician)
'awful roasting' is the wordplay.
'awful' indicates anagramming the letters.
'roasting' is an anagram of 'ORGANIST'.
'given' is the link.
(Other definitions for organist that I've seen before include "Church instr. player" , "It groans for church musician" , "Accompanist, keyboard player" , "Cathedral musician" , "One plays in church usually" .)