Old stage artist having brandy served with water in Charente? (7)
I believe the answer is:
marceau
'old stage artist' is the definition.
The definition suggests a singular noun which matches the answer.
'brandy served with water in charente?' is the wordplay.
'brandy' becomes 'marc' (marc is a kind of brandy).
'served with' says to put letters next to each other.
'water in charente?' becomes 'eau' (I can't explain this - if you can you should give a lot more credence to this answer).
'marc'+'eau'='MARCEAU'
'having' acts as a link.
Can you help me to learn more?
(Other definitions for marceau that I've seen before include "Marcel -, French mime artist" , "Famous French mime artist" , "famous artist speechless" .)