What does the cryptic crossword clue "Devotional work, one we possess, read aloud (4,2,5)" mean?

The wordplay uses a homophone (sounds like). Homophone of “book of ours” The answer is BOOKOFHOURS.

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

Guardian Cryptic #29349 | 20 Across | 2024-04-05 flower