Possible Clues:

• Craft loses wings in space above the pond
• Mrs Partington's main opponent
• Advocates' tax loophole tips and trick for getting across to America
• It covers about 20% of the Earth's surface
• Article on tender loving care admits is against huge divide between us and America
• Wingless aircraft entering space above ocean
• Kennebec River outlet, with "the"
• Finally reversing direction towards end avoids unknown part of frozen ocean
• View from Jones Beach
• An ocean of room at top to hold local area network