Possible Clues:

• Relating to matrimony
• A pun with a tail for the wedding
• That's not a single thing to make a plaint about you
• High point in Latin translation of wedding ceremony
• The French sex joke reversed wedding
• Like wedding ceremony at college, in Latin translation
• Put it in the nail for marriage
• Leaders of union, possibly, engaged in Latin translation of "union"?
• To do with a wedding
• Like marriage taking up Latin translation