Some land or something to work it (7)

I believe the answer is:

tractor

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

'something to work it' is the definition.
I can't judge whether this definition defines the answer.

'some land or' is the wordplay.
'some land' becomes 'tract' (tract can mean an area of land).
'tract'+'or'='TRACTOR'

Can you help me to learn more?

(Other definitions for tractor that I've seen before include "Vehicle used for hauling heavy loads" , "Agricultural vehicle" , "Bombardier possibly" , "Farming vehicle" , "Vehicle used on farms" .)

I've seen this clue in The Mirror.

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