How many letters does the top answer for “composer of the sorrows of young werther” have?

The most common answer is goethe (6 letters).

Crossword clue: composer of the sorrows of young werther

1 answer 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)

author of the sorrows of young werther 60% similar → goethe

wrote the sorrows of young werther 60% similar → goethe

composer of werther 50% similar → massenet