Possible Clues:

• Ruin sailors picked up behind bar
• Destroy or damage
• Stymie sailors reportedly supporting veto
• Ruin unloved folk instrument with interminable rock guitar
• Outlaw is Greek hero that needs no introduction to Irish ruin
• Ruin (informal)
• Informal word meaning to thwart or destroy
• Informal word meaning to ruin or destroy
• Positive word from Berlin after bar finds cross in local ruin
• Destroy, ruin, damage