Popular — attractive (3)
I believe the answer is:
hot
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">popular</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(hot can mean popular or trendy)</span><br/ ><br/ >'<span class="explanation-format__original">attractive</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for hot that I've seen before include "SECOND PART OF 11" , "Flaming - stolen" , "Flaming - spicy" , "(Of goods) stolen (colloq.)" , "Spicy or very warm" .)