Regimen (4)
I believe the answer is:
diet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">regimen</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 diet that I've seen before include "The kinds of food one eats" , "A disciplined food regime" , "Attempt to shift a few pounds" , "Try to lose weight" , "Food - parliament" .)