Act independently (2,2,5)
I think it could be either:
go it alone
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">act independently</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for go it alone that I've seen before include "Act independently" , "set up as freelancer" , "Take something on, eschewing any help" , "Proceed without the help of others" , "act without help" .)