River of wine! (5)
I believe the answer is:
rhine
I believe this is a double definition.
'river' is the first definition.
(Rhine is an example)
'wine' is the second definition.
(Rhine wine is an example)
'of' is the link.
(Other definitions for rhine that I've seen before include "Bonn's river" , "Flower" , "fed by 8 [RHUR]" , "Great German river with Lorelei Rock" , "valley" .)