Evening reception (6)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">evening reception</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for soiree that I've seen before include "A social gathering in the evening" , "Party assembled in the evening" , "Cultural at-home" , "Evening function" .)