Deceptive trick (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">deceptive trick</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 hoax that I've seen before include "Fool" , "Prank" , "Imposture" , "Fake, such as Piltdown Man" , "Deliberate trickery" .)
(Other definitions for ruse that I've seen before include "Plan intended to deceive" , "Deceptive manoeuvre" , "Deceptive device" , "trick played" , "Ploy, artifice" .)