Possible Clues:

• Twenty five pound in a note raised for a mackintosh, for instance
• A name for Venice or Brussels
• Setter's emphatic refusal to turn handle from place?
• Word or place-name derived from a person's name
• Twenty five pounds in English money initially for someone giving a name
• Word derived from person's name or placename
• General Anthony Wayne, to Waynesboro
• Gabriel Fahrenheit or Anders Celsius
• This writer's casual refusal upset Earl Grey, for example
• Derived name