Possible Clues:

• It holds writing fluid
• One Christmas king's replacing old source of penned speeches
• Old writer's accessory to make a good connection after striking first line?
• Reservoir for writing fluid
• Popular book's ending happily, a source for old-fashioned writer
• Desk reservoir
• Pot for quill
• In the old days, what pupils dipped into at school
• Small reservoir used to be found in a desk
• Once a source of blotches among schoolchildren