Capital of Lebanon (6)
I believe the answer is:
beirut
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">capital of lebanon</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for beirut that I've seen before include "Lebanese capital" , "Capital of 21 across" , "Middle East capital" , "Lebanon's capital" , "Capital city of Lebanon" .)