Sear some seafood... (4)
I believe the answer is:
char
I believe this clue is a double definition.
'sear' is the first definition.
(I know that sear can be written as char)
'some seafood' is the second definition.
(char is a kind of seafood)
(Other definitions for char that I've seen before include "Become black by burning" , "Brown" , "Burn; cleaner; fish" , "Daily cleaner; burn" , "Perhaps overheat" .)