'Wet' beer shop - that drunken establishment (3,6,4,2)
I believe the answer is:
the powers that be
'establishment' is the definition.
(the establishment)
'wet beer shop that drunken' is the wordplay.
'drunken' indicates an anagram.
'wet'+'beer'+'shop'+'that'='wetbeershopthat'
'wetbeershopthat' is an anagram of 'THE POWERS THAT BE'.
(Other definitions for the powers that be that I've seen before include "those who rule?" , "Existing exponents" , "those in authority?" , "Authorities" , "those with influence?" .)