How many letters does the top answer for “fiction scientist” have?

The most common answer is frisch (6 letters).

Crossword clue: fiction scientist

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

frisch 6 letters wd-fact-v3

Austrian zoologist noted for his studies of honeybees (1886-1982)

lagercrantz 11 letters wd-fact-v3

shelley 7 letters wd-fact-v3

Englishman and romantic poet (1792-1822)

science fiction scientist 67% similar → wells

speculative fiction scientist 67% similar → nodier

women's fiction scientist 67% similar → see

scientist scientist 50% similar → bacon, yakovlev