Related Clues:

• Not subject to bargaining
• Like some mattresses
• John Grisham novel, with "The"
• Standing pat
• Unwilling to negotiate
• Like some offers
• Unshakable
• Business partnership
• Hardheaded
• Tighten (up)
• Not negotiable
• Tofu specification
• Utterly unyielding
• Grisham novel (with "The")
• Unwilling to bend