Beethoven symphony
I believe the answer is:
eroica
'beethoven symphony' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for eroica that I've seen before include "Nickname of Beethoven's third symphony" , "Title of Beethoven's 3rd" , "Beethoven piece" , "19's 3rd 16" , "Name of a Beethoven symphony" .)