Frenchman drinks last of aged wine, getting plastered (8)
I believe the answer is:
rendered
'plastered' is the definition.
(I've seen this before)
'frenchman drinks last of aged wine' is the wordplay.
'frenchman' becomes 'rene'.
'drinks' means one lot of letters goes inside another.
'last of' indicates one should take the final letters.
'wine' becomes 'red' (red wine is a kind of wine**).
The last letter of 'aged' is 'd'.
'rene' placed around 'd' is 'rende'.
'rende'+'red'='RENDERED'
'getting' acts as a link.
(Other definitions for rendered that I've seen before include "Performed - given back" , "Given; plastered" , "Delivered - covered with plaster" , "Handed over" , "Made restitution" .)