The Ugly Duckling, in reality
I believe the answer is:
swan
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the ugly duckling in reality</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 swan that I've seen before include "Mute, whooper or Bewick's bird" , "Flighty" , "Whooper or trumpeter?" , "... Australian river" , "Large water bird" .)