Pretentious person (5)
I believe the answer is:
pseud
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pretentious person</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pseud that I've seen before include "Socially pretentious person" , "Poser" , "Pretentious type" , "Poseur (colloq.)" , "Pretender - fraud" .)