The term 'DISPATCH A FLY' can be solved by the four letter word 'SWAT'. SWAT stands for Special Weapons and Tactics, which is a law enforcement unit that is typically used in high-risk situations. They are trained to respond quickly and effectively to dangerous or critical incidents, such as hostage situations or terrorist attacks. The term 'dispatch a fly' refers to the act of sending a SWAT team to a location in order to resolve a situation.