Fret and fume (4)
I believe the answer is:
stew
'fret and fume' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for stew that I've seen before include "Wet food for wets" , "Large watercourse" , "Cook by long slow simmering" , "anxious state" , "Cook slowly and for a long time in liquid" .)