Based on the clue 'beethoven wrote many solo pieces for this instrume...', what is the answer?

Based on the clue 'beethoven wrote 4 overtures for this opera', what is the answer? Based on the clue 'beethoven wrote a battle symphony celebrating this...', what is the answer? Based on the clue 'beethoven wrote a sonata tchaikovsky a symphony w...', what is the answer? Based on the clue 'beethoven wrote but never sent 3 letters addressed...', what is the answer? Which performer is associated with 'beethoven'? Based on the clue 'beethovens 6th isnt called the bucolic symphony bu...', what is the answer? Based on the clue 'beethovens bagatelle in a minor for piano was even...', what is the answer? Based on the clue 'beethovens creatures of prometheus is music to acc...', what is the answer?