Fashionable, chic (5)
I believe the answer is:
smart
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">fashionable</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >'<span class="explanation-format__original">chic</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that chic can be written as smart)</span><br/ ><br/ ></span>
(Other definitions for smart that I've seen before include "Intelligent; clean, tidy" , "Neat - clever" , "Fine" , "Bright or dapper" , "fly" .)