Part of the Mass (6)
I believe the answer is:
gloria
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">part of the mass</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 gloria that I've seen before include "contribution to mass production" , "Portion of Mass" , "Part of the Mass; name" , "-- Gaynor, disco diva" , "Woman's name - Christian hymn praising God" .)