Gaffer (4)
I believe the answer is:
boss
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gaffer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for boss that I've seen before include "Stud; chief" , "excellent American > stud" , "Leader - knob on shield" , "27 [CHIEF]" , "One who manages" .)