Felt sorry about wine drinking you reported (4)
I believe the answer is:
rued
'felt sorry about' is the definition.
(I've seen this in another clue)
'wine drinking you reported' is the wordplay.
'wine' becomes 'red wine' (red is a type of wine).
'drinking' indicates putting letters inside (inserted letters are consumed or drunk).
'you reported' becomes 'U' (homophone of 'you').
'red' going around 'u' is 'RUED'.
(Other definitions for rued that I've seen before include "'Regretted, repented (4)'" , "was remorseful" , "Was sorry" , "Was contrite about" , "Bitterly regretted" .)