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

The most common answer is ellis (5 letters).

Crossword clue: clinical psychology scientist

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

ellis 5 letters wd-fact-v3

trump 5 letters wd-fact-v3

a brass musical instrument with a brilliant tone; has a narrow tube and a flared bell and is played by means of valves

psychology scientist 67% similar → blackmore, carnegie, chomsky

a scientist trained in psychology 50% similar → psychologist

social psychology scientist 50% similar → cuddy