Furniture item consisting of a low surface for kneeling and a rest for the elbows or books, for use when praying (4-4)

(Other definitions for prie-dieu that I've seen before include "It's knelt on for prayer" , "I'd 1 rupee (anag) - prayer desk" , "Item of furniture used for praying" , "On which to kneel and pray" , "Piece of furniture used in praying" .)