Superior water colour (4)
I believe the answer is:
lake
This could be a double definition.
'superior' is the first definition.
(I've seen this in another clue)
'water colour' is the second definition.
The answer and definition can be both natural objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
Can you help me to learn more?
(Other definitions for lake that I've seen before include "Superior's one" , "Excess of wine?" , "Water surrounded by land" , "Pool" , "Superior, e.g." .)