In bars, be up for port (8)
I believe the answer is:
brisbane
'for port' is the definition.
(I've seen this before)
'in bars be up' is the wordplay.
'up' indicates anagramming the letters (letters get chucked up).
'in'+'bars'+'be'='inbarsbe'
'inbarsbe' with letters rearranged gives 'BRISBANE'.
(Other definitions for brisbane that I've seen before include "Strange bairns be in Oz" , "Australian city" , "There be bairns in Australia" , "Queensland's capital" , "State capital of Queensland" .)