Source of refreshment befuddled king and writer (8,5)
I believe the answer is:
drinking water
'source of refreshment' is the definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Maybe there's an association between them I don't understand?
'befuddled king and writer' is the wordplay.
'befuddled' indicates an anagram.
'king'+'and'+'writer'='kingandwriter'
'kingandwriter' with letters rearranged gives 'DRINKING WATER'.
Can you help me to learn more?
(Another definition for drinking water that I've seen is " Aqua potabile".)