The crossword solution for the term AGENT, IN BRIEF is REP. A REP is a shortened form of the word representative, which is a person who acts on behalf of another person or organization. An agent is a type of representative who is authorized to act on behalf of another person or organization in a legal or business capacity. Agents are often used in the entertainment industry to represent actors, musicians, and other performers. They can also be used in the real estate industry to represent buyers and sellers.