Understand instinctively (6)
I believe the answer is:
intuit
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">understand instinctively</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 intuit that I've seen before include "work things out instinctively" , "Feel" , "Work out by instinct" , "Understand instinctively" , "Perform (role) in exaggerated manner" .)