Confess drinking wine is outrageous (8)
I believe the answer is:
shocking
'outrageous' is the definition.
(I've seen this before)
'confess drinking wine' is the wordplay.
'confess' becomes 'sing' (sing can informally mean to talk to the police).
'drinking' indicates putting letters inside (inserted letters are consumed or drunk).
'wine' becomes 'hock' (hock is a kind of wine).
'sing' placed around 'hock' is 'SHOCKING'.
'is' acts as a link.
(Other definitions for shocking that I've seen before include "Horrifying" , "form of execution?" , "result of bad wiring?" , "Causing disgust; very bad" , "Dreadful (shade of pink?)" .)