How many letters does the top answer for “author of the big parade” have?

The most common answer is vidor (5 letters).

Crossword clue: author of the big parade

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

vidor 5 letters wd-fact-v3

author of big sur 50% similar → kerouac

author of the big boss 50% similar → lee

author of the big sleep 50% similar → chandler

wrote the big parade 50% similar → vidor