Related Clues:

• Violent feud
• It might be resolved through mediation
• Interclan squabble
• Oasis vs. Blur, for example
• Long-term tiff
• Batted, never getting upset about rivalry
• Long-running fight
• State of prolonged mutual hostility
• Rhubarb with deep roots?
• Big beef
• Archdeacon 'aving 'eadgear, up for a fight
• The Clash can be relatively unpleasant?
• Bad blood between rappers, say
• Aim to break old soldier — army’s vicious campaign
• Vendetta not many’d spoken of