Related Clues:

• Common transport
• Type of heater
• Place to park
• Major gift for a teen
• Cougar or Jaguar
• It may get in a jam
• Compact, e.g
• Part of a train
• ''My Mother the ___'' ('60s TV show)
• Gridlock component
• Indy winner
• Automobile
• Hatchback, e.g.
• Private transport
• "Final frontier" related to this puzzle's theme