Possible Clues:

• Is that a case of a nondrinker's pain?
• This might be a case for diplomacy
• This small rectangular case carries documents
• Case that's not grammatical
• In case the cat is wild, for a start
• Specialist on embassy staff
• Man with a mission gets dry in a long case
• Case for a lawyer, say
• A dry sort of person longing to become a diplomat
• Cheat at falsely presenting a case