Staffer (4)
I believe the answer is:
aide
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">staffer</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 aide that I've seen before include "Idea (anag)" , "Personal assistant in the military" , "Right-hand man/woman" , "Military officer acting as assistant" , "Somebody helping" .)