Fretted (6)
I believe the answer is:
stewed
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fretted</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for stewed that I've seen before include "canned" , "Cooked slowly" , "Drunk; cooked in pot" , "(Meat) simmered; (tea) over-infused" , "felt uneasy" .)