Makes fun of member in saloon, drunk (8)
I believe the answer is:
lampoons
'makes fun of' is the definition.
(to lampoon someone is to mock or make fun of them)
'member in saloon drunk' is the wordplay.
'member' becomes 'MP' (Member of Parliament).
'in' is an insertion indicator.
'drunk' indicates an anagram.
'saloon' anagrammed gives 'laoons'.
'mp' inserted into 'laoons' is 'LAMPOONS'.
(Other definitions for lampoons that I've seen before include "Sends up" , "Ridicules publicly" , "parodies" , "Makes fun of" , "Satirises" .)