Possible Clues:

• Ill-defined situation
• Ill-defined region
• Ray eager to straighten out something ill-defined
• Neither one thing nor the other where the sun doesn't shine?
• Where it's unclear, agree to differ about chap that's upset
• Ill-defined category
• Unclear boundaries in this old people’s home?
• Ray eager to resolve doubtful situation
• Ill-defined item, eg a rare uncertainty finally resolved