Simmered (6)
I believe the answer is:
stewed
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">simmered</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for stewed that I've seen before include "casseroled!" , "felt uneasy" , "Slowly boiled" , "Cooked (prunes?)" , "Drunk; cooked in pot" .)