One in charge of staff (7)
I believe the answer is:
manager
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one in charge of staff</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for manager that I've seen before include "One running a shop, industry etc" , "Executive or controller" , "who tries to cope?" , "Person in charge of staff" , "Someone in control (or who copes?)" .)