Guard to observe staff (8)

I believe the answer is:

watchman

(Other definitions for watchman that I've seen before include "'Go Set a --', Harper Lee novel" , "Security guard" , "fellow on duty?" , "Sentinel" , "Night guard" .)

I've seen this clue in The Sun.

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.