Crossword Genius

In France, cat has water (wine for us, here) (7)

Ross

I believe the answer is:

chateau

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'wine for us here' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.

'in france cat has water' is the wordplay.
'in france cat' becomes 'chat' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'has' says to put letters next to each other.
'water' becomes 'eau' (I have seen 'French water ' mean 'eau' so perhaps 'water' could also mean 'eau').
'chat'+'eau'='CHATEAU'

Can you help me to learn more?

(Other definitions for chateau that I've seen before include "Castle (1)" , "French palace" , "country house in Bordeaux?" , "French manor house" , "Large French country house" .)

I've seen this clue in The Guardian.
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