Blame attached to farewell musical work (7)
I believe the answer is:
cantata
'musical work' is the definition.
(type of musical composition)
'blame attached to farewell' is the wordplay.
'blame' becomes 'can' (I can't justify this - if you can you should believe this answer much more).
'attached to' says to put letters next to each other.
'farewell' becomes 'tata' (I've seen this before).
'can'+'tata'='CANTATA'
Can you help me to learn more?
(Other definitions for cantata that I've seen before include "Vocal-orchestral piece" , "Vocal composition" , "Vocal work with orchestra" , "Musical composition with religious text" , "One of 200+ by Bach" .)