Crossword Genius

Our father is a runner bringing devotees to their knees

Ross

I believe the answer is:

prayer rug

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'our father' is the definition.
Both the definition and answer are singular nouns.
Maybe there's a link between them I don't understand?

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Another definition for prayer rug that I've seen is " appeals to master from here?".)

I've seen this clue in the Irish Times.
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