Cat given water in French castle (7)
I believe the answer is:
chateau
'french castle' is the definition.
(I've seen this before)
'cat given water' is the wordplay.
'cat given' becomes 'chat' (I can't explain this - if you can you should give a lot more credence to this answer).
'water' becomes 'eau' (I have seen 'French water ' mean 'eau' so perhaps 'water' could also mean 'eau').
'chat'+'eau'='CHATEAU'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for chateau that I've seen before include "eg Margaux" , "French stately home" , "Impressive house in France" , "Manor-house in France" , "Large country house in France" .)