Crossword Genius

Perhaps one adult is missing when boat enters the water (9)

Ross

I believe the answer is:

lunchtime

I'm a little stuck... Click here to teach me more about this clue!

But I can't explain it at all! Could you help me understand?

(Other definitions for lunchtime that I've seen before include "Midday period for eating" , "Maybe one" , "free period?" , "Midday break" , "When to take a short break" .)

I've seen this clue in The Guardian.
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.