Sly intelligence (5)
I believe the answer is:
guile
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sly intelligence</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for guile that I've seen before include "Artfulness, cunning" , "Foxiness" , "Deceitful cunning" , "Sly intelligence" , "Slyness" .)