Bulgarian capital (5)
I believe the answer is:
sofia
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bulgarian capital</span>' is the definition.<br/ ><span class="explanation-format__explanation">(capital of Bulgaria)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sofia that I've seen before include "capital place" , "seat of government" , "European city" , "capital city" , "Balkan capital" .)