River of wine (hock, etc.) (5)
I believe the answer is:
rhine
'river' is the definition.
(Rhine is an example)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for rhine that I've seen before include "Ring river (Wagner)" , "Bonn's river" , "River, rising in Switzerland and flowing into the North Sea" , "Great river that flows through Germany" , "Flower" .)