Stylishly luxurious (4)
I believe the answer is:
posh
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stylishly luxurious</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 posh that I've seen before include "Swanky" , "Elegantly luxurious" , "'Upper class, accent perhaps (4)'" , "Smart, fashionable" , "U" .)