Crossword Genius

Devotional work, one we possess, read aloud (4,2,5)

Ross

I believe the answer is:

book of hours

I'm a little stuck... Click here to teach me more about this clue!

'read aloud' is the definition.
The definition suggests a singular noun which matches the answer.

'devotional work one we possess' is the wordplay.
I cannot quite see how this works, but
'work' could be 'book' (book is a kind of work) and 'book' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for book of hours that I've seen before include "Devotional aid" , "Volume of prayers, often lavishly illustrated" .)

I've seen this clue in The Guardian.
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