Fop, beau (5)
I believe the answer is:
dandy
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">fop</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that fop can be written as dandy)</span><br/ ><br/ >'<span class="explanation-format__original">beau</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that beau can be written as dandy)</span><br/ ><br/ ></span>
(Other definitions for dandy that I've seen before include "Fashionable fellow" , "Fine for American" , "First-rate - fop" , "Foppish man" , "Marathon running strips" .)