The crossword solution for the term 'Superhero Symbol' is ESS, which stands for Emblem, Shield, and Symbol. These three elements are often used to represent a superhero in popular culture. An emblem is a design or symbol that is used to identify a person, organization, or product. A shield is a protective device that is used to ward off danger or harm. Lastly, a symbol is an object, action, or event that stands for something else, often representing an idea or emotion. All three of these elements are commonly used to represent a superhero in comics, movies, and other forms of media.