Related Clues:

• Carapace or explosive missile
• Carapace found on the beach
• Shades, perhaps, of what's hard outside
• Does it twinkle at the bottom of the sea?
• The ocean is certainly not heavenly and it is hard
• It's hard to find the ocean that's not heavenly
• Shades of having a hard cover
• It's hard to cover the shades with this, perhaps
• How one might get a blow in for Shelley?
• Shades, perhaps, of being hard outside
• In the constellation of Pisces?
• It's so hard that there's nothing heavenly under the ocean
• Hard to get outside such shades, perhaps
• Perhaps shades of what's in the tank
• It's hard to make the ocean by no means heavenly