Answer:

patrol

Answer	Crossword Clue
PATROL	Sentry
PATROL	Walk a beat
PATROL	Job for a cruiser

PATROL	Security group
PATROL	Stay on the beat?
PATROL	Cop's duty
PATROL	Reconnaissance group
PATROL	Protect the border, in a way
PATROL	Reconnoiter
PATROL	Recon unit
PATROL	Reconnaissance unit

PATROL	Shore or border group
PATROL	Keep the beat?
PATROL	Guard
PATROL	Scout unit
PATROL	Guard duty
PATROL	Look for trouble?
PATROL	Military unit
PATROL	Beat

PATROL	Cop's beat
PATROL	Police work
PATROL	Police routine
PATROL	Military group
PATROL	Soldier's assignment
PATROL	Sentry's duty
PATROL	Troop group
PATROL	Cruise in a cruiser

PATROL	Boy Scout unit.
PATROL	Eight Boy Scouts.
PATROL	Go the rounds.
PATROL	Perform sentry go.
PATROL	Boy Scout group.
PATROL	Do sentry duty
PATROL	Make the rounds
PATROL	Eight Boy Scouts, usually

PATROL	Part of S.P.
PATROL	Kind of wagon
PATROL	Traverse a beat
PATROL	Beat work
PATROL	Make the rounds in a police car