Teas brewed on a bench (4)
I believe the answer is:
seat
'bench' is the definition.
(I've seen this before)
'teas brewed' is the wordplay.
'brewed' is an anagram indicator.
'teas' anagrammed gives 'SEAT'.
'on a' acts as a link.
(Other definitions for seat that I've seen before include "Chair, bench, saddle, etc" , "MP's constituency" , "Place to sit" , "MP's place in parliament" , "Behind" .)