Erotica (4)
I believe the answer is:
porn
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">erotica</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that erotica can be written as porn)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for porn that I've seen before include "Obscene material" , "blue material" , "Lewd material (abbr)" .)