Related Clues:

• Contents of some cartridges
• Quill need
• Pad or well starter
• Cuttlefish defense
• Stubborn laundry stain
• Press coverage
• Calligrapher's supply
• Fluid in a well
• Cuttlefish protector
• Stamp-pad fluid
• Well fluid
• See 35 Across
• Cartridge filler, often
• Coating for some stamps
• Refill content