Naval warrant officer (6-2-4)

I believe the answer is:

master-at-arms

(Other definitions for master-at-arms that I've seen before include "Naval chief petty officer" , "Chief Petty Officer in charge of discipline" , "Senior naval petty officer responsible for discipline" , "Ship's chief police officer" , "enforcer of naval discipline" .)

I've seen this clue in The Independent.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.