Related Clues:

• One who brings change for the better
• One who changes organisation in order to improve
• One who changes or improves, say, an organisation
• It's not about the latter, for a change
• That's not about the latter do-gooder
• Not about the latter wanting for a change
• Maker of better laws - and anagrams!
• One dealing with abuses
• One making improving changes
• Concerned with first of two articles for Luther?
• One making changes (in practices)
• One making changes
• One was Luther King, always engaging for millions
• ... sometime after King Edward backed Wycliffe, say
• Course on religion by old Luther, for one