"A veil, rather than a mirror," per Oscar Wilde (3)
I believe the answer is:
art
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">a veil rather than a mirror per oscar wilde</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 art that I've seen before include "Works in a gallery" , "Skill in a specified thing" , "''... is long and life is short''" , "Trickery" , "Expertise" .)