Possible Clues:

• Two days before Ides of March, say, unluckily positioned?
• M's alphabet position
• Count this as a bonus roll or omen of misfortune?
• Apt ranking for this clue?
• Sitwell's unlucky emperor?
• First of audience escapes dire threat in the interval
• One later among these clues and this would be so unlucky?
• Unlucky position in order
• Unlucky Friday?
• The unluckiest one to follow dozen others