### Clue: Bible book briefly picked up before end of religious service (4)
### Answer: MASS 
 ### Explanation: Definition: service
 **Reversal of**(… picked up, in a down clue) SAM(abbrev. for /briefly "Samuel", a book in the Hebrew Bible) **plus**(before) **last letter of**(end of) "religious".
Defn: A religious ….