Furtive, duplicitous (6)
I believe the answer is:
shifty
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">furtive</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">duplicitous</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for shifty that I've seen before include "Suspicious-looking" , "Sly, shady" , "Shady, dubious" , "Constantly changing; deceitful, evasive" , "Devious - wily" .)