Possible Clues:

• Memory LANE wistfulness
• Lost again badly, it brings wistful feelings
• What's lost again aroused such a feeling?
• A longing for the past
• Love encapsulated by a lasting sort of sentimentality
• Laureate likened it to a "sweet pain in the heart"
• What's lost, again being recollected?
• Longing for something past — isn't a goal (anag)
• Longing for things past
• Sentimental feeling unfortunately lost again