Lead aide out to Australia (8)
I believe the answer is:
adelaide
'lead aide out to australia' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for adelaide that I've seen before include "Commonwealth city" , "Queen to William IV - setting for many an 6 test" , "port in Oz" , "Girl" , "Australian city named for William IV's queen" .)