Related Clues:

• Hard fruit or informal lunatic
• Seed of an oak
• 'Almond or cashew, say (3)'
• To do wrong or be wrong
• The fruit of the shoetree?
• One might be wanting to be one
• The sort of fruit that's just on one foot
• Well, it doesn't sound this way
• How one gets noise by the yard from this little bird
• A hard case for 1 down
• The case is hard for one by a washer
• Screwy enough to turn the big vessel over
• Screwy and round the bend
• A hard case in 23 across
• It's hard to be not all there