Related Clues:

• More than a tiff
• Hatfield-McCoy doings
• Vendetta
• Ongoing quarrel
• Family fight
• Long-lasting dispute
• 'Family --'
• Long-running argument
• Family trouble
• Bad-blood situation
• Interclan conflict
• Ongoing squabble
• Bitter quarrel between two families
• Long-running tiff
• Montague vs. Capulet, e.g.