1) Asking 2) Ave Maria is one 3) Devout prayer 4) Devout supplication 5) Earnest appeal 6) French word used in English 7) Petition 8) Prayer 9) Prayer book selection 10) Prayer or petition 11) Request 12) Reverent petition to a deity Found on https://www.crosswordclues.com/clue/orison
Or'i·son noun [ Old French orison , oreson , oreison , French oraison , from Latin oratio speech, prayer. See Oration .] A prayer; a supplication. [ Poetic] Chaucer. Shak. « Lowly they bowed, adoring, and began Their orisons , each morn... Found on http://www.encyclo.co.uk/webster/O/32