Misguidedly being open! (5)
I believe the answer is:
begin
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">open</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">misguidedly being</span>' is the wordplay.<br/ >'<span class="explanation-format__original">misguidedly</span>' indicates anagramming the letters.<br/ >'<span class="explanation-format__original">being</span>' anagrammed gives '<span class="explanation-format__answer">BEGIN</span>'.<br/ ></span>
(Other definitions for begin that I've seen before include "Institute" , "Commence" , "former Israeli Nobel peace prize winner" , "Initiate" , "Israeli statesman" .)