Related Clues:

• It may need air
• Grow weary
• The fifth is spare
• Hollow out
• Dullard
• It can wear down from too much travel
• Tiresome one
• Get jaded
• Yawn-inducing speaker
• Knock out
• It's carried in a trunk
• Start to give out
• Run out of gas
• Road runner
• Evoke yawns