Austrian capital (6)
I believe the answer is:
vienna
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">austrian capital</span>' is the definition.<br/ ><span class="explanation-format__explanation">(capital of Austria)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for vienna that I've seen before include "Capital city of Austria" , "Adult home of Beethoven, Brahms, Mozart and Schubert" , "Capital on the Danube Canal" , "City of Strauss and the waltz" , "somewhere in Austria" .)