"Sex Education" actor Butterfield (3)
I believe the answer is:
asa
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sex education actor butterfield</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 asa that I've seen before include "OT character" , "iconoclastic king of Judah ..." .)