Adjutant (4)
I believe the answer is:
aide
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">adjutant</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for aide that I've seen before include "auxiliary" , "One to assist" , "Officer in attendance" , "Assistant to a more senior person" , "Second" .)