Possible Clues:

• Direction to strike - direction which is obscure
• Note cuts and note concealment
• Loss of overhead light is naturally temporary
• In which one body may be overshadowed by another
• Occasional coverage The Sun has provided
• Throw into obscurity, outshine
• Hide cuts in energy repeatedly
• Fastens together in ease, by the sound of it, as it's so obscure
• Repeated point about excerpts leading to obscurity
• Obscuring of one celestial body by another