Crossword Genius

Bordeaux's appealing twice about a sweet top wine (10)

Ross

I think it could be either:

beaujolais

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

'wine' is the definition.
(Beaujolais is an example)

'bordeaux's appealing twice about a sweet top' is the wordplay.
I cannot quite understand how this works, but
'about' could be 'a' (abbreviation in Chambers) and 'a' is found within the answer.
'a' is present in the answer.
'sweet' could be 'jo' (old-fashioned term of endearment) and 'jo' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for beaujolais that I've seen before include "drink" , "French light red wine" , "Burgundy wine" , "Light red wine from south-east France" .)

I've seen this clue in The Guardian.
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