Crossword Genius

Wine/Port in Germany? Yes (5)

Ross

I believe the answer is:

rioja

I'm a little stuck... Click here to teach me more about this clue!

'yes' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for rioja that I've seen before include "Popular Spanish wine" , "Spanish wine variety" , "Spanish red wine" , "kind of red" , "Spanish wine type" .)

I've seen this clue in The Hindu.
Want a hint initially instead of a full solution? Install my app