The term 'security threat' can be summarized as a potential danger to the safety of an individual or group. In this context, the crossword solution for the term is 'SPY, ' which refers to a person who secretly collects information about another person or organization. A SPY may use various methods to obtain information, such as eavesdropping, surveillance, or infiltration. Spies are often employed by governments or organizations to gain intelligence on their adversaries.