Related Clues:

• Obstinate swine isn't just this!
• Obstinate when promoted, soldier with power was leading
• Obnoxious person was in the van, refusing to bend
• Stubborn and arrogant, having change at top
• Revolting animals were so stubborn?
• Were Orwell's animals so stubborn?
• Stupidly obstinate
• Wilful greedy guts was in charge
• Stubborn in a porcine way
• Stubbornly persistent (or boarish?)
• Stubborn and cocky, bishop's overcome by power