Name given to Beethoven's Symphony No 3 (6)
I believe the answer is:
eroica
'name given to beethoven's symphony no 3' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for eroica that I've seen before include "Name of a Beethoven symphony" , "noted work" , "Title of Beethoven's 3rd" , "Nickname of Beethoven's third symphony" , "Beethoven piece" .)