How many letters does the top answer for “wrote mary stuart” have?

The most common answer is schiller (8 letters).

Crossword clue: wrote mary stuart

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

schiller 8 letters wd-fact-v3

German romantic writer (1759-1805)

author of mary stuart 50% similar → schiller

wrote mary poppins 50% similar → andrews, travers

wrote stuart little 50% similar → white