Solemn vows (5)
I believe the answer is:
oaths
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">solemn vows</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for oaths that I've seen before include "Imprecations" , "professions of loyalty" , "Swear words" , "Solemn promises or curses" , "Solemn sworn promises" .)