Jamaican citrus fruit
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">jamaican citrus fruit</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ugli that I've seen before include "Cross between Seville orange, grapefruit and tangerine" , "Black/violet element" , "Grapefruit/tangerine hybrid" , "Hybrid of tangerine and grapefruit" , "Citrus fruit cross (which sounds offensive!)" .)