I was certain 2 down2DBlue island liqueur [-------] had a different second letter, and for 10 across10ASensible, but unlikely, reason for a wedding [-------], I thought, "huh, I don't understand this clue for this answer, oh well." Then as I was combing through my answers to find what was wrong, I had the proverbial "aha" moment.
Very nice twist on the theme!