18 across
Served
red,
red
wine
(WI
abstaining)
to
get
plastered
(8)
Served red, red wine (WI abstaining) to get plastered (8)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
The definition is to get plastered, meaning to be covered in plaster or render (a wall is rendered). "Served" is the anagram indicator applied to RED + RED + NE (the word "wine" with WI removed, or "abstaining"), giving the letters that rearrange into RENDERED.