How many letters does the top answer for “wrote narcissus and goldmund” have?

The most common answer is hesse (5 letters).

Crossword clue: wrote narcissus and goldmund

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

hesse 5 letters wd-fact-v3

Swiss writer (born in Germany) whose novels and poems express his interests in eastern spiritual values (1877-1962)

author of narcissus and goldmund 50% similar → hesse

wrote black narcissus 50% similar → powell

wrote the nigger of the 'narcissus' 50% similar → conrad