Train those emptying machine removed from mine (5)

I believe the answer is:

teach

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

'train' is the definition.
(I know that train is a more specific form of the action teach)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for teach that I've seen before include "Impart skills or 3 down" , "Tutor" , "Pass on knowledge" , "Give instruction to" , "Educate 4 across" .)

I've seen this clue in The Irish 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.