___-chef (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">chef</span>' is the definition.<br/ ><span class="explanation-format__explanation">(both can mean someone who cooks)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cook that I've seen before include "Kitchen worker" , "Prepares a hot meal" , "Heat food" , "Falsify - chef" , "Brown?" .)
(Another definition for sous that I've seen is " Old French coins".)