Appointing an agent is a common practice in many industries. In this case, the term APPOINT AN AGENT is represented by two crossword solutions: SPY (3 letters) and REP (3 letters). SPY stands for a person who is employed to secretly observe and investigate people or situations, while REP stands for a representative or agent who acts on behalf of another person or organization. Therefore, APPOINT AN AGENT can be interpreted as hiring a SPY or representative to act on one's behalf.