Keep time, in a way (4)

I believe the answer is:

snap

(Other definitions for snap that I've seen before include "Photograph - without warning" , "Crack; bite" , "Break under strain" , "Speak irritably; photo" , "give way" .)

I've seen this clue in The Wall Street Journal.

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.