Related Clues:

• Ring cops with names originally involved
• Ring, once forged, ending in Doom on mountain route
• Surround, hold
• Include name in order to come and go
• Admit old member into enclosure with ticket
• Corrupt cop names head of smuggling ring
• Cover of only half useful navigational aid?
• Surround with trained men to guard company on way through mountains
• Surround; include
• Take in strange oxygen-depleted moonscapes
• Surround and hold
• Include case for European navigation device