Answer: dminor

AnswerCrossword Clue
DMINORBeethoven's Ninth key
DMINORKey of Beethoven's Ninth
DMINORKey of Mozart's Requiem Mass
DMINORBach's "Toccata and Fugue in ..."
DMINORKey of Mozart's "Requiem"
DMINORF's analogue
DMINOR"The Art of Fugue "key
DMINORKey of Beethoven's Ninth.
DMINORKey of Bach's "The Art of Fugue"
DMINORThe saddest key, supposedly
DMINORKey that's an anagram of a neighboring answer
DMINORKey with one flat
DMINORKey of Dvorak's Symphony No. 7