Stakeout

Noun

 * 1) The act of watching a location, generally covertly.
 * The police had a stakeout in place where they expected the crime to occur.

Thesaurus
bugging, cloak-and-dagger work, counterespionage, counterintelligence, electronic surveillance, espial, espionage, following, intelligence, intelligence work, military intelligence, observation, secret police, secret service, shadowing, spying, surveillance, tailing, trailing, wiretap, wiretapping

Anagrams

 * outskate
 * outtakes
 * takeouts