They may well be deep in their work (6)

I believe the answer is:

miners

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 miners that I've seen before include "Pit workers" , "Labourers below ground" , "They work to get ore and minerals from the earth" , "They work below ground" , "out in 1972?" .)

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.