In charge (2,3,4)
(Other definitions for at the wheel that I've seen before include "in a car" , "Driving a vehicle" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">in charge</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Another definition for at the helm that I've seen is " Directing affairs".)