Related Clues:

• See 11
• See 6
• See 7
• The optimist sees 9 at its end
• Dig fast, surfacing around centre of mounds
• Melody containing new line to hold most of these lines
• Underpass
• (Soppy) fairground ride
• Condition where one can only see objects directly ahead
• Gopher's route
• Let nun go to the dogs in underground passage
• Way into Dublin port for ghost with narrow focus
• Subterranean passage
• Ant farm feature
• Underground route