Large fish (8)
(Another definition for eagle ray that I've seen is " Fish".)
(Other definitions for stingray that I've seen before include "Fish with venomous tail" , "menace in the water" , "Poisonous spined fish" , "Large fish with tail spine" , "Dangerous fish" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">large fish</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 sturgeon that I've seen before include "provider of delicacy?" , "The fish that yields caviar" , "Main resident" , "Fish - got nurse (anag)" , "So urgent to find caviar-bearing fish" .)