Bishop's responibilty - providing witness (3)
I believe the answer is:
see
'witness' is the definition.
(I know that witness is a more specific form of the action see)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for see that I've seen before include "Bishops office" , "Receive" , "Watch, equal (a bet)" , "Perceive; diocese" , "Meet (someone) socially" .)