Old car cleaner, you might say (8)

I believe the answer is:

brougham

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'old car' is the definition.
'brougham' can be an answer for 'car' (brougham is a kind of car). I am unsure of the 'old' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for brougham that I've seen before include "Old carriage" , "Four-wheeled horse-drawn carriage" , "Horse-drawn 19 down" .)

I've seen this clue in The Sunday Times.

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