April 1 victim (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">april 1 victim</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for fool that I've seen before include "Idiot" , "Dessert of pureed fruit and cream" , "Trifle" , "Ass - clown" , "Part of 1 25 [KING LEAR]" .)