Related Clues:

• Become bored or weary
• Lose oomph
• Run down
• Bad thing to blow
• Cheap swing
• Run out of steam
• Lose power
• Fatigue
• Inflation target
• Service-station item
• Wear down
• Makeshift swing
• With 43-Across, leaver of a mark
• One may become bald
• Weary