Possible Clues:

• In an unassuming, unpretentious way
• Member of teenage group changing style with diffidence
• Without pretension
• Chaste lady on vacation avoiding excess
• Without boasting, it's my oldest collection
• With humility
• In the main, covering both sides of debate in proper way
• Without boasting, it's my oldest puzzle
• In a self-effacing way
• Cover girl, say, crossing street, unknown character in low-key fashion