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

The most common answer is perovski (8 letters).

Crossword clue: collector scientist

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

perovski 8 letters wd-fact-v3

rothschild 10 letters wd-fact-v3

any of family of powerful Jewish bankers in Europe

zoological collector scientist 67% similar → snethlage

scientist scientist 50% similar → bacon, yakovlev