Innate behaviour (8)
I believe the answer is:
instinct
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">innate behaviour</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 instinct that I've seen before include "Gut feeling" , "Thoughtless impulse" , "Inborn impulse to behave in certain way" , "Innate behaviour" , "Natural aptitude" .)