Possible Clues:

• After tea, is drug provided for coach?
• Old coach is last to leave, following after tea
• In old coach station, rush to catch one
• ... carriage one gets into after hunt?
• Horse-drawn carriage used for transporting passengers or mail
• Coach station, one in game preserve
• Chap's toe is awkwardly placed in coach
• After hunt, one's carried in old coach
• Make orderly at hospices carry letters in one
• After hunting, one's put in carriage