#undercover_agent__spy  a secret agent hired by a state to obtain (military) information about its enemies or by a business to obtain industrial secrets from competitors
  supertype:  secret_agent__intelligence_officer__intelligence_agent__operative  a person secretly employed in espionage for a government
  instance:  Mata_Hari
  subtype:  counterspy__mole  a spy who works against enemy espionage
  subtype:  double_agent  a spy who works for two mutually antagonistic countries
  subtype:  espionage_agent  someone employed to spy on another country or business competitor
  subtype:  foreign_agent__foreignagent  a spy for a foreign country
  subtype:  infiltrator.undercover_agent  someone who takes up a position surreptitiously for the purpose of espionage
  subtype:  sleeper.undercover_agent  a spy planted in advance for future use but not presently active

No statement uses or specializes undercover_agent; click here to add one.