Answer:

guards

Answer	Crossword Clue
GUARDS	Palace figures
GUARDS	Gatekeepers
GUARDS	Watches

GUARDS	Security staffers
GUARDS	Security workers
GUARDS	Basketball players.
GUARDS	Sentries.
GUARDS	London's Beefeaters.
GUARDS	Linemen.
GUARDS	Protects
GUARDS	Coldstream men

GUARDS	Sentinels
GUARDS	Cerberus et al.
GUARDS	Argus and Cerberus
GUARDS	Beefeaters
GUARDS	Some football linemen
GUARDS	Beefeaters, e.g.
GUARDS	Two of five in basketball
GUARDS	Property protectors

GUARDS	Buckingham Palace employees
GUARDS	Post men
GUARDS	Injury preventers
GUARDS	Jazz duo?
GUARDS	Gallery workers
GUARDS	Keeps safe