Direct and officious librarian in Bow? (5)
I believe the answer is:
usher
'direct' is the definition.
(ushering is a kind of directing)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for usher that I've seen before include "falling house" , "Person employed to put you in your place" , "Old teacher" , "Show in - escort" , "Introduce" .)