How many letters does the top answer for “wrote the cats of ulthar” have?

The most common answer is lovecraft (9 letters).

Crossword clue: wrote the cats of ulthar

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

lovecraft 9 letters wd-fact-v3

author of the cats of ulthar 50% similar → lovecraft

wrote cat and mouse 50% similar → grass

wrote i am a cat 50% similar → soseki

wrote the black cat 50% similar → poe