La Traviata composer (5)
I believe the answer is:
verdi
'la traviata composer' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for verdi that I've seen before include "Italian composer, d. 1901" , "Opera producer" , "note writer" , "Italian composer (Aida)" , "one put on at La Scala" .)