Consecrate as a priest (6)
I believe the answer is:
ordain
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">consecrate as a priest</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 ordain that I've seen before include "Decree authoritatively" , "frock" , "Decree or appoint to priesthood" , "Lay down (law)" , "Appoint ceremonially to the priesthood" .)