Possible Clues:

• Across the pond
• From London to New York, e.g.
• Crossing an ocean
• Clan’s tartan — it’s different from America?
• From Europe to America
• Like some cruises
• Like most of the voyages of 55-Across
• Crossing 'the Pond'
• Concerning Britain and the US
• Short answer in rising dish and left caper on other side