The capital of Western Australia (5)
I believe the answer is:
perth
'the capital of western australia' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for perth that I've seen before include "City of Scotland" , "Home of fair maid" , "Scottish/Australian city" , "Capital of Western Australia" , "Town at the head of the Tay estuary" .)