Some legislatures (5)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">some legislatures</span>' is the definition.<br/ ><span class="explanation-format__explanation">(diet is a kind of legislature)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for diets that I've seen before include "Commons" , "Tides (anag.)" , "causing stones to vanish" , "Regimens" , "Disciplined eating regimes" .)