Australian city turning inward (6)
I believe the answer is:
darwin
'australian city' is the definition.
(city in Australia)
'turning inward' is the wordplay.
'turning' indicates anagramming the letters.
'inward' is an anagram of 'DARWIN'.
(Other definitions for darwin that I've seen before include "Turn inward for the antipodean city" , "Charles ...... originated the theory of evolution" , "He initiated the theory of evolution" , "Charles . . . . . ., great scientist of evolution" , "Naturalist and Australian city" .)