Hearken (6)
I believe the answer is:
listen
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hearken</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that hearken is a more specific form of the action listen)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for listen that I've seen before include "Follow advice" , "Pay heed (to advice)" , "Give ear (to)" , "Lend an ear (6)" , "Hark!" .)