Operatic character of marriage! (6)
I believe the answer is:
figaro
'operatic character' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for figaro that I've seen before include "Beaumarchais hero" , "Hero of Mozart opera" , "hairdresser" , "Barber, subject of Rossini & Mozart operas" , "The Barber of Seville" .)