Food regimen (4)
I believe the answer is:
diet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">food 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 "Calorie-watching regimen" , "Food intake regime" , "Part of regime" , "Slimming regime" , "Eat sparingly" .)