UK capital (6)
I believe the answer is:
london
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">uk capital</span>' is the definition.<br/ ><span class="explanation-format__explanation">(capital of United Kingdom)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for london that I've seen before include "City of the Cockneys" , "British capital" , "- Clay; - pride; - plane" , "Construction across the Thames near the Monument" , "UK's capital" .)