Jean-Jacques __, author of The Social Contract (8)

I believe the answer is:

rousseau

(Other definitions for rousseau that I've seen before include "Jean-Jacques --, Genevan philosopher" , "Impressionist" , "Is Esau sour about the Swiss philosopher?" , "He did paintings" , "Jean-Jacques --, Swiss philosopher" .)

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.