Related Clues:

• Small sea creature
• Slow slithery animal
• Edible terrestrial mollusc
• Soft-bodied garden animal with shell
• Sounds as if there's nothing ill with us and with Shell
• Won't go fast, even when driven at last
• The South gets driven for this 32 across
• Slow-moving gastropod
• ___ mail
• Nuclear submarine
• Nuclear sub built from tin with usual reaction
• One moving house in no hurry
• Knight in voyage that isn't quick
• Just a shell until USA converted it into a nuclear sub
• Insult divers find acceptable to the French sub