How many letters does the top answer for “wrote it happened tomorrow” have?

The most common answer is clair (5 letters).

Crossword clue: wrote it happened tomorrow

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

clair 5 letters wd-fact-v3

author of it happened tomorrow 50% similar → clair

director of it happened tomorrow 50% similar → clair