Act of keeping watch, 6 letters
I lapse into discovery, 6 letters
Observation of El Pa, 6 letters
Observation, old-style, 6 letters
The act of detecting something, 6 letters
Catching sight of something, 6 letters
Furtive observations, 7 letters
Observations of Elias: Sp., 7 letters
Undercover operations, 7 letters
Caught a glimpse of, 6 letters
Caught sight of a famous exterminator?, 11 letters
Uses binoculars, say, 6 letters
Pentax camera brand, 5 letters
French secret agent, 6 letters
French secret agent (or, ageless secret agent's work?), 6 letters
One page is corruptly gathering secrets (9), 9 letters
Plants engage in it, 9 letters
Undercover activity, 9 letters
The systematic use of spies to get military or political secrets, 9 letters