Related Clues:

• Indispensable
• "Defense of Fort M'Henry" author
• Tab, for one
• Map part
• Free-throw area
• Anthem author
• CTRL, e.g.
• Integral
• "Defense of Fort M'Henry" writer
• Low isle
• G, but not H
• Decoder's tool
• Small, low island
• C minor, for one
• Answer sheet