Map quite possibly shows famous Kent country house (9)

I believe the answer is:

chartwell

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

'famous kent country house' is the definition.
I know nothing about this answer so I can't tell whether this works.

'map quite possibly' is the wordplay.
'map' becomes 'chart' (chart is a kind of map).
'quite possibly' becomes 'well'.
'chart'+'well'='CHARTWELL'

'shows' is the link.

Can you help me to learn more?

(Other definitions for chartwell that I've seen before include "Winston Churchill's Kent home" , "Churchill's place?" .)

I've seen this clue in The Telegraph.

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