Do they work for a pittance? (6)

I believe the answer is:

miners

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

'do they' is the definition.
The definition suggests a plural noun which matches the answer.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for miners that I've seen before include "They excavate the earth" , "They work below ground" , "Pit workers" , "Extractors" , "Labourers below ground" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app