Crossword Genius

Passed a range we know south of plain (9)

Ross

I believe the answer is:

overtaken

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

'passed' is the definition.
('overtake' can be a synonym of 'pass')

'a range we know south of plain' is the wordplay.
I cannot really understand how this works, but
'a' is within the answer.
'range' could be 'ken' (ken can mean someone's range of knowledge) and 'ken' is found in the answer.
'of' could be 'o' and 'o' is located in the answer.
The remaining letters 'vert' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for overtaken that I've seen before include "left behind" , "Passed on road" .)

I've seen this clue in The 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.