Ridiculous car Tatler chose as one for the smart set? (7,7)

I believe the answer is:

chelsea tractor

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

'one for the smart set?' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'ridiculous car tatler chose' is the wordplay.
'ridiculous' indicates an anagram.
'car'+'tatler'+'chose'='cartatlerchose'
'cartatlerchose' with letters rearranged gives 'CHELSEA TRACTOR'.

'as' acts as a link.

Can you help me to learn more?

(Another definition for chelsea tractor that I've seen is " Huge 4WD".)

I've seen this clue in The Guardian.

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