How many letters does the top answer for “author of silent movie” have?

The most common answer is brooks (6 letters).

Crossword clue: author of silent movie

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

brooks 6 letters wd-fact-v3

United States literary critic and historian (1886-1963)

author of bee movie 50% similar → winfrey

author of silent spring 50% similar → carson

wrote silent movie 50% similar → brooks