The crossword solution for the term 'Subject for Freud' is EROS, which is a four-letter word. EROS is the Greek god of love and desire, and is often associated with Freud's psychoanalytic theories. Freud believed that EROS was a fundamental force in human life, and that it was responsible for the development of the individual's personality. He also believed that EROS was the source of creativity and pleasure.