Dieter’s lunch (5)
I believe the answer is:
salad
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dieter's lunch</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 salad that I've seen before include "Mainly raw cold dish" , "Cold dish of raw vegetables" , "Raw greens, mainly" , "One may well be green" , "Cold vegetable dish" .)