Possible Clues:

• Ivory sources
• Some ivory whisks utilised selectively to make a flip?
• Pointers for those with unfailing memories?
• Jobs of work with university for a feature on Morse
• Mammoth growths
• Elephant's weapons
• They are found growing next to trunks
• Does the owner ever forget having such teeth?
• Mammoth things
• Protrusions used to incapacitate poachers, hopefully