Related Clues:

• Become weary
• Old piano key material
• Sixth word in the Pledge of Allegiance
• Lose oomph
• Run out of steam
• Tire
• Key composition?
• Tusk material
• Off-white
• Checkered banner at the track
• Old Glory, for one
• Word with tower or coast
• Olympic ceremony sight
• Off-white shade
• Elephant tusk