Possible Clues:

• That's the way to be living with a groan
• Derived from animal or vegetable matter
• Fundamental sort of farming
• Lively and pipey, perhaps
• The heart perhaps is ruling - it's only natural!
• Chemical and GM free
• Produced without artificial fertilisers
• Oscar racing badly? That's natural
• The sort of crop I can grow out West, perhaps
• Made from living matter