Capital of Serbia (8)
I believe the answer is:
belgrade
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">capital of serbia</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for belgrade that I've seen before include "Capital city - large bed (anag)" , "It was Byzantine" , "Balkan capital" , "Serbian city" , "In foreign city" .)