Answer: ninjas

AnswerCrossword Clue
NINJASJapanese assassins of old
ninjasNINJA, a feudal Japanese warrior
ninjasmember of a feudal Japanese society of mercenary agents, highly trained in martial arts and stealth (ninjutsu), who were hired for covert purposes ranging from espionage to sabotage and assassination
NINJASStealth fighters
NINJASMen in black
NINJASMercenaries of yore
NINJASWarriors with supposed powers of invisibility and shapeshifting
NINJASMasked fighters
NINJAS"The Last Samurai" extras
NINJASSneakers from long ago?
NINJASThrowing star assassins
NINJASShogun's servants
NINJASStealthy fighters
NINJASSilent assassins
NINJASShuriken throwers
NINJASMartial arts experts
NINJASFictional teenage turtles
NINJASJapanese mercenaries
NINJASStealthy warriors
NINJASStar pitchers?