Bit of news about wine (6)
I believe the answer is:
report
'bit of news' is the definition.
(I've seen this in another clue)
'about wine' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'wine' becomes 'port' (port wine is a kind of wine).
're'+'port'='REPORT'
(Other definitions for report that I've seen before include "Narrative given by porter" , "Write-up" , "A crack" , "Explosion" , "Account, of news say" .)