Related Clues:

• Explorer - innovator
• One entering new territory
• Lead the way
• Found only in dock structure
• First of a kind
• Duke, perhaps, hosts one about to become an explorer
• One in landing-place is explorer
• Part of bridge - holding ace, take the lead
• Eg, Livingstone, Park
• Cask full of oxygen always needed for spacecraft
• Lead the way round one pillar
• Seaside feature includes one for the first time in the field
• In post, I break new ground
• Open up post containing a joke
• Mole interrupted by a certain person arriving early