Of holy rites
I believe the answer is:
sacral
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">of holy rites</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 sacral that I've seen before include "In the region of spine base, or of large triangular bone there" , "of bones" .)