Keep a watch on (7)

I believe the answer is:

monitor

(Other definitions for monitor that I've seen before include "Observe over time" , "Lizard; display screen" , "Keep a check on" , "Prefect; a loudspeaker" , "Keep a watching brief" .)

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.