Where once was wet and watery government, in France (5)
I believe the answer is:
vichy
'where once was wet and watery government in france' is the definition.
The definition suggests a singular noun which matches the answer.
This is the entire clue.
Can you help me to learn more?
(Other definitions for vichy that I've seen before include "French wartime capital" , "French spa town" , "French city" , "Town form which iccupied France was administered during WW2" .)