How many letters does the top answer for “author of mansfield park” have?

The most common answer is austen (6 letters).

Crossword clue: author of mansfield park

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

austen 6 letters wd-fact-v3

English novelist noted for her insightful portrayals of middle-class families (1775-1817)

author of jurassic park 50% similar → crichton

author of parks and recreation 50% similar → poehler

wrote mansfield park 50% similar → austen