Answer:

stakeout

Answer	Crossword Clue
STAKEOUT	Surveillance by the police
STAKEOUT	Police work
STAKEOUT	Police procedure

STAKEOUT	Mark with pegs.
STAKEOUT	Police surveillance
STAKEOUT	Surveillance
STAKEOUT	Police action
STAKEOUT	Plan to catch a criminal

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.