Possible Clues:

• One breaking fruitcake split for food
• Substance that nourishes
• Substance that provides nourishment, may be included in 6 Down
• What sustains teachers? Nothing in France, student's conclusion
• Bit of taleggio on loaf (nothing French) gives some sustenance
• I turn ten chops, very healthy food
• Head given nothing for French? Time for healthy input
• Item of food - fruit - one's taken in payment
• It gives energy and builds tissue
• Fruit split apart - inside I found vitamin maybe