Pretence or disguise (10)
I believe the answer is:
masquerade
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">pretence</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(masquerade is a kind of pretence)</span><br/ ><br/ >'<span class="explanation-format__original">disguise</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(masquerading is a kind of disguising)</span><br/ ><br/ ></span>
(Other definitions for masquerade that I've seen before include "False show - disguise oneself" , "Adam's queer? (anag)" , "Deception" , "False show; pretence" , "where everyone's wearing the veil" .)