Hungarian composer (6)
'hungarian composer' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for liszt that I've seen before include "Brahms and - is rhyming slang for drunk" , "with his partner, drunk?" , "Franz . . . . ., 19th century Hungarian composer and pianist" , "music writer" , "Franz -, Hung. pianist" .)
'hungarian composer' is the definition.
(20th-century Hungarian composer Bela Bartok)
This is the entire clue.
(Other definitions for bartok that I've seen before include "Bela ------ (1881-1945), Hungarian composer" , "Bela -, nineteenth and twentieth century Hungarian composer" , "Bela -, Hung. composer" , "Hungarian composer of folk music" , "Hungarian-born composer, d. 1945" .)