Timepiece with a gnomon (7)

I believe the answer is:

sundial

(Other definitions for sundial that I've seen before include "Outdoor timing device" , "It's an indication of the time" , "Instrument showing the time" , "Old-timer" , "Natural timekeeper" .)

I've seen this clue in The Times.

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.