Bordeaux's fine wine (4)
I believe the answer is:
Here is my best explanation:
This clue is a double definition.
'bordeaux's fine' is the first definition.
('ca va' can mean 'fine' in French eg in Bordeaux)
'wine' is the second definition.
(I have seen 'Spanish wine ' mean 'cava' so perhaps 'wine' could also mean 'cava')
(Other definitions for cava that I've seen before include "Sparking wine", "Spanish "champagne"", "sparkling drink", "Sparkler", "Sparkling Spanish wine", "Spanish sparkling white wine", "Spanish fizz", "Spanish bubbly" and "Spanish sparking wine".)