Possible Clues:

• Invisable
• Behind the curtain
• You need faith to cite this, in a manner of speaking
• Foreign language text removed from the Observer
• Hidden from view
• Nun wanders around diocese with unprepared translation
• Sounds as if I have not got it when the nun gets around the diocese
• You can't be 31 across what's this
• Without appraisal
• In view of this, it's not the nun around the diocese