Possible Clues:

• Sad ruse (anag.)
• A fool, and terribly rude, that's for certain
• No doubt that's you with the silly, ruddy thing around (7)
• Thus, perhaps, one ascertained how much at home one was
• It's certainly sad about 33 down
• Confident, self-possessed
• Silly you to get so ruddy certain of yourself!
• Confident, secure
• Certain country backed sacking one journalist
• Charlie got better opener out without doubt