How many letters does the top answer for “history of islam scientist” have?

The most common answer is crone (5 letters).

Crossword clue: history of islam scientist

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

crone 5 letters wd-fact-v3

an ugly evil-looking old woman

ishaq 5 letters wd-fact-v3

islam scientist 67% similar → hanbal, murray, shariati

ancient history scientist 50% similar → meyer, vidalnaquet

art history scientist 50% similar → dvorak, elder, gombrich

church history scientist 50% similar → caesarea

conceptual history scientist 50% similar → koselleck

cultural history scientist 50% similar → assmann, lamprecht, yates

economic history scientist 50% similar → lamprecht, sombart

history of art scientist 50% similar → burckhardt