Former Belgrade bigwig (4)
I believe the answer is:
tito
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">former belgrade bigwig</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tito that I've seen before include "Yugoslav marshal" , "Head of state" , "Josip Broz pseudonym" , "Revolutionary" , "Former leader of country" .)