Related Clues:

• Star's part
• Essential for an investigator
• Loosen up, maybe
• See 36 Across
• Olive or corn follower
• Be in front
• Lamp fuel
• Rembrandt painting
• Supply in Iraq
• OPEC commodity
• Vinegar partner
• Olive byproduct
• Top-billed performer
• Light on a dashboard
• It's well-regulated