Related Clues:

• Supporting piece of wood - shaft of light
• Autograph instrument
• Treaty-signing memento
• One chained to a desk, say
• Ray of sun
• Grin broadly
• Support piece
• Declaration of Independence writer?
• Feather-and-ink successor
• Signer's implement
• "___ me up, Scotty!"
• Penitentiary, slangily
• Prison, informally
• Writer in American jail
• Confident crossword solver's choice