Crossword Genius

Islam's new religious book (6)

Ross

I believe the answer is:

missal

'religious book' is the definition.
(I've seen this before)

'islam's new' is the wordplay.
'new' indicates an anagram.
'islams' is an anagram of 'MISSAL'.

(Other definitions for missal that I've seen before include "Prayer book for th Catholic mass" , "Religious book" , "guide for the services" , "Book of prayers and rites" , "Book used in RC Mass" .)

I've seen this clue in The Globe and Mail.
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