Diplomatic building (7)
I believe the answer is:
embassy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">diplomatic building</span>' is the definition.<br/ ><span class="explanation-format__explanation">(embassy is a kind of diplomatic building)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for embassy that I've seen before include "Overseas mission" , "foreign mission abroad" , "senior diplomat's residence ..." , "Headquarters of diplomatic staff abroad" , "Diplomatic office or residence." .)