Professional cook (4)
I believe the answer is:
chef
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">professional cook</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for chef that I've seen before include "Principal cook" , "Chief male cook in restaurant" , "Professional cook" , "Head cook in a restaurant" , "member of kitchen staff" .)