Unexpected arrangement of pub art (6)
I believe the answer is:
abrupt
'unexpected' is the definition.
(I've seen this in another clue)
'arrangement of pub art' is the wordplay.
'arrangement of' indicates an anagram.
'pub'+'art'='pubart'
'pubart' anagrammed gives 'ABRUPT'.
(Other definitions for abrupt that I've seen before include "Short and brusque" , "Curt and short" , "Unexpected -- precipitous" , "Short, sharp or sudden" , "without warning" .)