How many letters does the top answer for “wrote monsieur gangster” have?

The most common answer is audiard (7 letters).

Crossword clue: wrote monsieur gangster

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

audiard 7 letters wd-fact-v3

author of monsieur gangster 50% similar → audiard

wrote monsieur klein 50% similar → delon