Related Clues:

• Not easy to see
• On the down-low
• Behind-the-scenes
• Not clear
• Hardly open
• Not properly explained
• Opaque
• Like a CIA operation
• Camouflaged, perhaps
• Like many CIA ops
• Not clearly expressed
• Make less visible
• Clandestine, furtive
• Indistinct or not well-known
• Dim, indistinct or not well known