Spanish capital (6)
I believe the answer is:
madrid
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">spanish capital</span>' is the definition.<br/ ><span class="explanation-format__explanation">(capital of Spain)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for madrid that I've seen before include "Spanish capital" , "European capital city" , "Capital of Spain since 1561" , "City with the Prado national art gallery" , "Spain's capital" .)