Enter a clue or pattern or both:
The Clue
Keeper of confidential information (15 letter answer)
The Answer
UNDERCOVERAGENT
Tags
Notes
The answer UNDERCOVERAGENT is rarely seen, appearing only about once every 2400 puzzles.
Related Clues
Spy
Bond, e.g.
James Bond, e.g.
Le Carré's Smiley, for one