Intervene (4,2)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">intervene</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that intervene can be written as step in)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for step in that I've seen before include "Substitute" , "Intervene dramatically, or at a senior level" , "Interrupt" , "Type of garment" , "Shoe with no fastenings" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">intervene</span>' is the definition.<br/ ><span class="explanation-format__explanation">(to mediate is to intervene between two parties)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for mediate that I've seen before include "Act as negotiator between opposing side" , "Act as intermediary" , "ie Tamed (anag.)" , "Conciliate" , "moderate" .)