The crossword solution for the term 'TO KNOW, TO MARCEAU' is 'SAVOIR' (6 letters). The French verb 'savoir' means 'to know' and is derived from the name of the famous mime artist Marcel Marceau. Marceau was a French actor and mime artist who was renowned for his silent performances and his ability to convey emotion without speaking. He was known for his signature character, Bip the Clown, and his iconic quote, 'To know, to Marceau.'