Possible Clues:

• Quite sure, positive
• No doubt the crate is broken in this
• No doubt there's a broken crate in here
• Convinced train will be derailed by ice, I must get off
• Fixed middle parts of act entertainers put together
• Proved beyond doubt
• Hanging cloth needs one bit changed? Sure!
• Guaranteed
• Particular art nice, surprisingly
• Positive or particular