Possible Clues:

• Boil has burst? Stop
• Axe I lift up to cut timber
• Scrap line I inserted in a nonsensical talk
• Stop sailor heading out from Gdansk?
• Get rid of sailor from Poland lacking origin
• Stop a black bull heading off
• Axe short tree trunk, one overshadowed by tree
• Pitch up, being restrained by excellent mum in scrap
• Destroy
• Annul - eradicate