An Australian state capital (6)
(Other definitions for hobart that I've seen before include "Destination of an annual yacht race starting at Sydney" , "Port of Tasmania" , "capital on an island" , "Capital city of 11 Across" , "Tasmanian port" .)
(Other definitions for adelaide that I've seen before include "Commonwealth city" , "Girl" , "Australian capital" , "19th century queen" , "town" .)
(Other definitions for brisbane that I've seen before include "There be bairns in Australia" , "State capital of Queensland" , "port" , "Australian city" , "Aussie location" .)