Blueblood (10)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">blueblood</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for aristocrat that I've seen before include "Member of the nobility" , "Noble" , "What's listed in Debrett" , "toff" , "Patrician" .)