Possible Clues:

• An affirmative, perhaps, way to behave
• Swear there will be a victory. Next ball: wicket!
• Declare nothing's been smuggled in a car
• Make a promise
• Swear nothing's been hidden in a car
• Acknowledge some say we will not pay property tax
• Frankly declare
• State positively
• Affirm a five-nil winning start
• Assert — admit