Possible Clues:

• Wear or scrape away
• A hairdo, say, to wear down
• Wear diamonds deposited in a Scottish bank
• Scrape off second slice of daily bread, dropping middle onto floor
• Wear away in America sporting beard
• Experience the friction writing to Bill in Lincoln
• Eat away at a bread roll?
• Wear down painter finally settled in Lincoln
• Erode
• Rub roughly