Possible Clues:

• Feature of a Flair pen
• (Pen with) fibre point
• Feature of a certain pen
• Piece of advice offered to experienced writer
• Was sensible waiter in receipt of this from the contented writer?
• Pen with a fibrous nib
• Writer touched on mine being turned round
• Soft pen type
• Writer was emotionally affected by clue
• Marker's mark maker