Ian Fleming wrote about a man with this profession in novels like Casino Royale.
In a James Fennimore Cooper novel named after this profession, Harvey Birch is suspected of doing this job for England, and this occupation finishes the title of a John le Carré novel called Tinker, Tailor, Soldier, (*) "this." Ian Fleming wrote about a man with this profession in novels like Casino Royale. For 10 points, name this profession held by secret agents like James Bond.
In a James Fennimore Cooper novel named after this profession, Harvey Birch is suspected of doing this job for England, and this occupation finishes the title of a John le Carré novel called Tinker, Tailor, Soldier, (*) "this."
 spy (accept clear equivalents; accept secret agent before it is read)