Made a complaint about Lou guzzling fortified wine (8)
I believe the answer is:
reported
'made a complaint about' is the definition.
(I've seen this before)
'lou guzzling fortified wine' is the wordplay.
'lou' becomes 'reed' (I am not sure about this - if you are sure you should believe this answer much more).
'guzzling' is an insertion indicator (I've seen this in other clues).
'fortified wine' becomes 'port' (port is a kind of fortified wine).
'reed' placed around 'port' is 'REPORTED'.
Can you help me to learn more?
(Other definitions for reported that I've seen before include "Type 16 [OF SPEECH]" , "Gave an account" , "Complained about" , "Made a complaint about" , "Chronicled" .)