French castle talk — by water there (7)
I believe the answer is:
chateau
'french castle' is the definition.
('castle' in French)
'talk by water there' is the wordplay.
'talk' becomes 'chat' (I've seen this in other clues).
'by' is a charade indicator (letters next to each other).
'water there' becomes 'eau' (I have seen 'French water ' mean 'eau' so perhaps 'water' could also mean 'eau'. I am not sure about the 'there' bit.).
'chat'+'eau'='CHATEAU'
Can you help me to learn more?
(Other definitions for chateau that I've seen before include "Loire Valley attraction" , "Large country house in France" , "French county house" , "French wine producer" , "Country residence" .)