Sombre information about the young French wine (5,4)

'the young french wine' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'sombre information' is the wordplay.
I cannot really understand how this works, but
'sombre' could be 'grave' (I've seen this before) and 'grave' is present in the answer.
'information' could be 'news' (news is a kind of information) and 'news' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

'about' acts as a link.

Can you help me to learn more?