Experienced, shrewd (7)
I believe the answer is:
knowing
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">experienced</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">shrewd</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for knowing that I've seen before include "Cunning" , "Fly" , "Being aware of" , "Experienced; intelligent" , "State of awareness" .)