Possible Clues:

• Disembarks when traffic control is introduced
• Settles a kind of insult, having moved son to other end
• Touches down in burning sun
• Gets down article with one's knowledge
• Gets off when holding torch, perhaps
• Steps down, from a bus say
• Detrains, e.g
• Dismounts from a horse
• If one gets down to it, this gives a 6 down quite a start