Communion cup (7)
I believe the answer is:
chalice
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">communion cup</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 chalice that I've seen before include "Church vessel" , "Necessity for communion" , "Church wine cup" , "Wine cup used at Christian Eucharist" , "Communion cup" .)