Possible Clues:

• Experts attempt to include knight in family tree
• Heritage
• Trips with no leader needing time on railway line
• A curious crest in New York shows family lineage
• Coat of arms device run down in one family
• Can tyres burst travelling down the line?
• Descent
• Head away from discos etc to make an effort for one’s family
• Holding north, top fighter pilots attempt descent
• Line dances, overlooking daughter's attempt