### Clue: A pair of bishops could have books for him (5)
### Answer: ABBOT 
 ### Explanation: Definition: him
 A + B,B(abbrev. for "bishop" twice;a pair of) **plus**(could have) OT(abbrev. for the Old Testament, books in the Bible).
Defn: One who is head of an abbey of monks, who might very well be visited by bishops bearing books.