Possible Clues:

• Goethe play with music by Beethoven
• Goethe play for which Beethoven wrote incidental music including an overture
• Beethoven work based on a Goethe play
• Revolting Fleming celebrated by Goethe and Beethoven
• Beethoven's '-- Overture'
• Goethe play about a Flemish warrior
• Mount --, volcanic peak on North Island, New Zealand
• Beethoven overture, say, working within limits of Mozart
• Got men to play Beethoven overture
• Badly atrophied deity