Keep a close watch on (7)

I believe the answer is:

monitor

(Other definitions for monitor that I've seen before include "Sort of lizard" , "giant lizard" , "one checks continuously" , "Observe over time" , "in-class help" .)

I've seen this clue in the Newsday.

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.