Music in motet Verdi revised? (12)
I believe the answer is:
divertimento
'music' is the definition.
(divertimento is a kind of music)
'in motet verdi revised?' is the wordplay.
'revised?' indicates an anagram.
'in'+'motet'+'verdi'='inmotetverdi'
'inmotetverdi' with letters rearranged gives 'DIVERTIMENTO'.
(Other definitions for divertimento that I've seen before include "Light musical piece" , "Piece of music" , "Light orchestral work" .)