New US oil mines for oversized vehicles (10)

I believe the answer is:

limousines

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

'oversized vehicles' is the definition.
'limousines' can be an answer for 'vehicles' (limousine is a kind of vehicle). I am not certain of the 'oversized' bit.

'new us oil mines' is the wordplay.
'new' indicates an anagram.
'us'+'oil'+'mines'='usoilmines'
'usoilmines' is an anagram of 'LIMOUSINES'.

'for' is the link.

Can you help me to learn more?

(Another definition for limousines that I've seen is " cars".)

I've seen this clue in the Sydney Morning Herald.

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