Looked for boozer that's disgusting inside (6)
I believe the answer is:
sought
'looked for' is the definition.
('seek' can be a synonym of 'look for')
'boozer that's disgusting inside' is the wordplay.
'boozer' becomes 'sot' (I've seen this in another clue).
'that's disgusting' becomes 'ugh' (expression of disgust).
'inside' means one lot of letters goes inside another.
'sot' going around 'ugh' is 'SOUGHT'.
(Other definitions for sought that I've seen before include "Attempted to find" , "Searched for - investigated - desired" , "Tried to find" , "Wanted" , "Looked for" .)