__ Noster (Lord's Prayer) (5)

I believe the answer is:

pater

(Other definitions for pater that I've seen before include "Taper away like father" , "Our Father - . . . . . Noster" , "Dad (Latin)" , "A posh father, from Latin" , "Walter --, English essayist; father" .)

I've seen this clue in the Newsday.

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