Related Clues:

• Underground layer
• Fuel reserves first found just beneath the surface
• The lower earth, so to speak
• Fuel for warship that may be dug up down under
• It's used to cultivate press employees and what they burn at midnight?
• Reserves fuel - it's found under the bed
• Boats need fuel — it's under the bed
• Earth lying just under the surface
• Lends money to fuel Underground feature
• Regular payments on fossil fuel -- it's found under ground
• Greasy fluid found by press employees in earth
• People standing in something greasy that's under the bed?
• Fuel for warships in part of earth that's covered
• Reserves -- fuel that lies beneath what lies beneath
• Field stratum