Coxcomb (3)
I believe the answer is:
fop
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">coxcomb</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for fop that I've seen before include "Man excessively concerned with fashion" , "One affected" , "'Dandy, coxcomb (3)'" , "A dandy, overdressed man" , "Gallant" .)