Related Clues:

• Person filled with excessive zeal for cause
• One is motivated by irrational enthusiasm
• Insane person
• It's cracked
• Aunt gets confused in a pound, I see, and in her mind
• Be moderate one can't, if a person like this
• No moderate way to have a revolver over the attic, by the sound of it
• One's gathering that this is not only nuts in May
• One's dotty and grand to be in advertising
• The sort of nut that's got a screw loose
• A nut within a nut
• One ranting and raving
• Involved in a cult that's crazy
• Crank turning, in fact, engrosses one
• I'm tremendously keen to dissipate fat and I can!