Answer: jsbach

AnswerCrossword Clue
JSBACH"Goldberg Variations" composer, in brief
JSBACHP.D.Q.'s father, supposedly
JSBACH"St. Matthew Passion" composer
JSBACHMass master, in brief
JSBACH"The Well-Tempered Clavier" composer
JSBACH"St. John Passion" composer
JSBACHMusical great whose grave went unmarked for nearly 150 years
JSBACHMass producer, for short
JSBACH"St. Matthew Passion" composer, for short
JSBACH"Original father of harmony," per Beethoven, briefly
JSBACH"Musical Offering" composer
JSBACHComposer of the "Brandenburg Concertos," in brief
JSBACHSignature in music.
JSBACHBaroque giant
JSBACHMajor Baroque composer's signature
JSBACHFocus of an annual Leipzig festival
JSBACHBaroque byline
JSBACHC.P.E.'s father
JSBACHWith L.v. Beethoven and J. Brahms, the third of the three B's
JSBACHProlific cantata composer