Possible Clues:

• Bury (or, perhaps, Milan)
• Lay to rest in abbey by river with no walls
• Season with 'won' not featuring? One'll get put down!
• Prefix with ''personal'' or ''planetary''
• Double you and bury this when it's cold
• Put in grave situation in leaderless period of decline
• Bury having match with Italian team
• Is the berry sound?
• Get this underground with ten mixed in it
• Double you and so bury it when it's cold