Related Clues:

• Nuts about, with "on"
• Solid
• In a tight spot
• Extremely obstinate
• Impossible to move
• In a rut
• Insisting
• Not subject to bargaining
• In a pickle
• In traffic, say
• Held fast
• Like some mattresses
• John Grisham novel, with "The"
• Stiff-necked
• Standing pat