What appears on disc of Mozart produced in Australia (7)
I believe the answer is:
amadeus
'what appears on disc of mozart' is the definition.
(Wolfgang Amadeus Mozart)
'produced in australia' is the wordplay.
'produced' becomes 'made' ('make' can be a synonym of 'produce').
'in' indicates putting letters inside.
'australia' becomes 'aus' (abbreviation).
'made' placed inside 'aus' is 'AMADEUS'.
(Other definitions for amadeus that I've seen before include "Film on Mozart's life" , "Film/play life of Mozart" , "Shaffer play; Forman 1984 film" , "Mozart play/film" , "Biopic" .)