Old racer clever tho' eccentric (9)

I believe the answer is:

chevrolet

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'old racer' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'clever tho' eccentric' is the wordplay.
'eccentric' indicates anagramming the letters.
'clever'+'tho'='clevertho'
'clevertho' with letters rearranged gives 'CHEVROLET'.

Can you help me to learn more?

(Another definition for chevrolet that I've seen is " American car".)

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