
1) Inside man in spydom 2) James bond and george smiley 3) Mole 4) Spy novel figure 5) Spy on the inside 6) Spy who lives dangerously
Found on
https://www.crosswordclues.com/clue/double-agent

In the field of counterintelligence, a double agent (also double secret agent) is an employee of a secret intelligence service, whose primary purpose is to spy on a different target organization, but who, in fact, is a member of the at target organization. Double agentry may be practiced by spies of the target organization who infiltrate the contr...
Found on
http://en.wikipedia.org/wiki/Double_agent

(from the article `Russia`) ...in 1905–07. The police felt able to combat it only by infiltrating their agents into the revolutionary parties and particularly into the terrorist ... ...worked for the intelligence branch of the Foreign Office (MI-6) and then was sent to the Middle East College for Arabic Studies, Lebanon (1960). ......
Found on
http://www.britannica.com/eb/a-z/d/69

[
n] - a spy who works for two mutually antagonistic countries
Found on
http://www.webdictionary.co.uk/definition.php?query=double%20agent

a person who spies on a country while pretending to spy for it. · a spy in the service of two rival countries, companies, etc.
Found on
https://www.infoplease.com/dictionary/double-agent
No exact match found.