Subtle deception (8)
I believe the answer is:
artifice
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">subtle deception</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 artifice that I've seen before include "skilful deception" , "Subtle deception" , "a lot of tricks" , "Ingenious stratagem" , "Clever device" .)