Possible Clues:

• Leaving out nothing, given important task
• Love special task to find something left out
• Exclusion from old job
• Oversight? Ring diplomatic office abroad
• Neglected item
• Failure of bullet-hole, perhaps, at the Alamo?
• After appeal to teacher, best to reverse exclusion
• Old girl persistently yattering about single lapse
• Old embassy is something that's been neglected
• Ring calling oversight