Oven dish (9)
I believe the answer is:
casserole
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">oven dish</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for casserole that I've seen before include "Large cooking dish" , "Dish cooked in an earthenware pot" , "Stew-pan" , "Dish (served in a dish of the same name)" , "(Food cooked in a) stewpot" .)