Possible Clues:

• Poles go round thumping loonies
• Poles surround complete eccentrics
• Nurse worried about limits of test for eccentrics
• Poles must welcome complete idiots
• They're crackers having fruit, that leads to disturbed rest
• Fruitcakes from northern States
• Headbangers, say, in middle of Kansas
• Idiots trapped in cavern -- utter stupidity
• Crazy folk speak, interrupting partners at table
• Some Bacup dancers, say, going in opposite directions