Brown and simmer (6)
I believe the answer is:
braise
'brown and simmer' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for braise that I've seen before include "Fry then stew, eg, steak" , "13 across (anag)" , "Fry then stew (meat)" , "Cook or stew slowly" , "Re bias (anag.)" .)