The term 'KIND OF CATCHER' can be solved by the three letter word 'SPY'. A SPY is a person who secretly collects information about an individual or organization for a government or other organization. Spies often use covert methods to gain access to sensitive information, such as eavesdropping, surveillance, and infiltration. They may also use more sophisticated methods, such as hacking into computer systems or using sophisticated surveillance equipment. Spies are typically employed by intelligence agencies, military organizations, or private companies.