Possible Clues:

• Moralistic type managed to protect Italian after backing up
• One with very strict moral principles
• Killjoy makes joke about woman
• Strait-laced girl to be educated in wit, of a sort
• Play on words about educated girl, a strictly moral type
• Extremely strict girl cracks joke
• Joke about educated woman, who didn't recognise Noel?
• Strict moralist
• Feeble joke about girl being strait-laced
• Old Protestant’s bread, brown