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

The most common answer is beskow (6 letters).

Crossword clue: illustration scientist

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

beskow 6 letters wd-fact-v3

dragt 5 letters wd-fact-v3

smit 4 letters wd-fact-v3

inflict a heavy blow on, with the hand, a tool, or a weapon

scientist scientist 50% similar → bacon, yakovlev