Dutch royal house — fruit (6)
I believe the answer is:
orange
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">dutch royal house</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">fruit</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(orange is a kind of fruit)</span><br/ ><br/ ></span>
(Other definitions for orange that I've seen before include "Colour of an onager?" , "Fruit - part of the spectrum" , "Princely house" , "Round fruit (6)" , "Colour between red and yellow" .)