Small orange carp (8)
I believe the answer is:
goldfish
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small orange carp</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for goldfish that I've seen before include "Fairground prize" , "he may go round in a tank" , "Popular piscine pet" , "Orange-red freshwater fish" , "Bowl or pond dweller" .)