Capital of the Czech Republic (6)
I believe the answer is:
prague
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">capital of the czech republic</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for prague that I've seen before include "European capital" , "Rather quiet" , "Czech Republic's capital" , "Capital city of Czech Republic" , "Gear up for this European city" .)