In the know (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">in the know</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for aware that I've seen before include "Acquainted with or conscious of" , "Acquainted with or mindful of" , "Having knowledge or realisation" , "Cognizant" , "Attentive" .)