Rich seafood soup (7)
I believe the answer is:
chowder
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rich seafood soup</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 chowder that I've seen before include "Thick seafood soup" , "Clam stew, soup" , "Fish soup for cowherd" , "Thick soup containing clams or fish" , "Rich soup with fish, clams etc." .)