Possible Clues:

• Ghostly
• Like the colors of the rainbow
• Like a ghost
• Spelt CAR wrong? That's spooky!
• Eerie
• Spooky police officer, not at home, misses old gangster
• Without oxygen second muscle may become insubstantial
• Spooky policeman dropping in over escaping gangster
• Sulphur and oxygen extracted from muscle of a range of shades
• Like a phantom appearing in phosphorus, shrouded in scarlet, eerily