Related Clues:

• Coal hole
• Harbor hazard
• Source of 37-Across
• Rich source of fossil fuel
• Go for the gold, maybe
• Harbor danger
• Get the gold?
• Get the lead out?
• Seven Dwarfs' workplace
• Salt source
• Selfish one's exclamation
• Vein site
• Where Loretta's dad worked
• Lode setting
• Bore for ore