Book of hymns (7)
I believe the answer is:
psalter
'book of hymns' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for psalter that I've seen before include "Cherub-like" , "Books of Psalms" , "sacred work" , "Book used in church" , "Copy of the Book of Psalms" .)