Isocrates, for one, was an ancient Greek rhetorician and philosopher who lived in the 5th century BC. He is considered to be one of the ten greatest Attic orators and was known for his skill in rhetoric. His works focused on the use of rhetoric in public discourse and the importance of education. He is often referred to as the 'Father of Rhetoric' due to his influence on the development of the art of rhetoric. The crossword solution for Isocrates, for one, is RHETOR, a six-letter word meaning one who is skilled in the art of rhetoric.