Initiation rite (7)
I believe the answer is:
baptism
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">initiation rite</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for baptism that I've seen before include "Christian sacrament that symbolises admission to the church" , "Church admission rite" , "Initiation; christening" , "Religious rite involving water" , "Christian sacrament requiring pouring of water" .)