Possible Clues:

• Clio squirming about with inner pain
• Inside it's not nice to have oil inside a couple of centuries
• The oil mixed in one c.c. of this is enough to upset you inside
• Does the oil inside cause pain inside?
• Pain in the stomach.
• Illness? Pass on one cold
• A severe tummy ache
• Visiting clinic, I locate back pain
• Abdominal pain suffered by babies and horses
• It's sad that this should follow the sound of a melon in such a painful way