Thick seafood soup or stew (7)
I believe the answer is:
chowder
I believe this is a double definition.
'thick seafood soup' is the first definition.
(I've seen this before)
'stew' is the second definition.
(I know that Chowder is a type of stew)
(Other definitions for chowder that I've seen before include "Thick seafood soup" , "clammy" , "Rich soup with fish, clams etc." , "Thick fish stew" , "Clam stew, soup" .)