Related Clues:

• Sort of key (found in cupboard?)
• Framework of bones
• Framework (kept in the cupboard?)
• The white part of the orange
• White tissue in oranges
• Orange's white?
• Lining of rind - important part
• Scheme reduced to its essential elements
• Body frame
• Fibrous part of fruit — essence
• Notes written up about unusual elk bones
• Core — essence
• Body-frame
• Down to the bare bones in press
• Heart of the matter provides horsepower to drive back over it