Possible Clues:

• Nourishment of citrus fruit in a book
• I'm tucking into a fast food
• Food I am given in a time of abstinence
• Fertiliser in the insect, is most nourishing
• Illness
• Touched down, carrying soldiers' food
• Illness having turned up I left food
• Nourishment
• A good book about fruit supplying good nourishment
• Something which nourishes - meal tin (anag)