Trying to Think of a Word

For something I was writing, I've been trying to think of a word. At least, I think there's a word. My agitated brain cells even think it starts with "c." Online thesauri have not been helpful. I've often found that once I put a question out there, the answer occurs to me. So, I thought I'd horde-source it. Ought to at least be good for a few laughs.

Exemplary, conservative moral rectitude, especially sexually. Celibacy when single, connubially faithful, "straight" as the twisted used to say.

11 down, twelve letters. (Just kidding on that part.)