Related Clues:

• Like starched collars
• Unwilling to bend
• Not flexible, as muscles
• Lucky one?
• Intolerant
• Boardlike
• Potent, as a potable
• Unwilling to compromise
• Stiff, inflexible
• Starched, rigid
• Rigid, unbending
• Stiff, unbending
• Stiff and inflexible
• Stiff work for the spade back at the end
• One gets stiff in the grid