Cosmopolitan (13)
I believe the answer is:
sophisticated
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cosmopolitan</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sophisticated that I've seen before include "Possessed of culture, refinement and 24" , "Cosmopolitan" , "Worldly" , "very complicated" , "Cultured; refined" .)