Possible Clues:

• There's no alibi to put out for cancellation
• Complete ending (of something)
• The ending (in the British Empire) of slavery after William Wilberforce’s campaigns
• End of slavery
• Wilberforce achieved this changing oil in boat
• Scared off anabolic steroid - it destroys the system
• Subject of 'Are Prisons Obsolete?' and 'The End of Policing'
• A way to be doing with this?