The Cardiff Giant, for one (4)
I believe the answer is:
hoax
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the cardiff giant for one</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for hoax that I've seen before include "Imposture" , "Deliberate trickery" , "Humorous or malicious deception" , "cod" , "Prank" .)