Possible Clues:

• Riddle-solving aid
• Clue in Telegraph intractable
• Suggestion from wraith in Tolkien
• 'Give me a ___'
• It might get you an answer
• Clue from winner eclipsing Boatman's last
• Clue is tenuous, time to finish!
• Helpful tip for a puzzler
• Bit of help in an escape room
• Very small amount