Thomas Mann novella (5,2,6)
I believe the answer is:
death in venice
'thomas mann novella' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for death in venice that I've seen before include "Opera by Britten based on a Thomas Mann novella" , "Novel by Thomas Mann" , "Thomas Mann novella set in Italy" , "Mann wrote it" .)