How many letters does the top answer for “composer of faust” have?

The most common answer is goethe (6 letters).

Crossword clue: composer of faust

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

goethe 6 letters wd-fact-v3

German poet and novelist and dramatist who lived in Weimar (1749-1832)

gounod 6 letters wd-fact-v3

French composer best remembered for his operas (1818-1893)

composer of q18345138 50% similar → mccreary

composer of q19413951 50% similar → nimri

composer of q20856802 50% similar → gosling, hurwitz

composer of q49740 50% similar → raine

composer of q58045522 50% similar → fox