How many letters does the top answer for “wrote surrealist manifesto” have?

The most common answer is breton (6 letters).

Crossword clue: wrote surrealist manifesto

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

breton 6 letters wd-fact-v3

a Celtic language of Brittany

author of surrealist manifesto 50% similar → breton

wrote scum manifesto 50% similar → solanas

wrote the communist manifesto 50% similar → engels