Possible Clues:

• Drink upsets precious type from group working as an intermediary of late
• Participant in session with board resulting in happy medium if successful?
• Medium type of whiskey is uniquely tipped with top stars
• Intermediary between the living and the dead
• Medium habit is coming in double
• Medium or small practice is absorbed by mine
• Medium
• Advice circulated about religious ceremony is for a believer