Possible Clues:

• One's gathering that this is not only nuts in May
• Madman in a cult is out of control
• Originally locked up now and then, if crazed?
• Maniac left in charge, upper-class Nationalist having got in
• Madman second on the moon, they say?
• Crazed
• At one, during meal, discarding hard nut
• At one during meal husband refused bananas
• Privy Greek hero
• Madman nearly finished meal, eating at one