Related Clues:

• Very important source of energy on windy piece of land in Loch Ness
• Key German city, one captured by British soldiers at length
• Sees new Latin translation as something necessary
• Type of oil obtained for key?
• Indispensible
• Key German city rejected milk from France
• In Germany, chopping up tail is mandatory
• Important in the highest degree
• German city took item back with almost everything that's crucial
• Tails seen, perhaps, as necessary
• Necessary, else stain will show
• Indispensable element made as tensile as possible
• Key set in seal needing to be broken
• Key alien's set free
• Indispensable lease isn't renewed