Spot the bishop's province! (3)
I believe the answer is:
see
This clue is a double definition.
'spot' is the first definition.
(both can mean to notice or observe)
'bishop's province' is the second definition.
(I've seen this in another clue)
'the' acts as a link.
(Other definitions for see that I've seen before include "View; realise" , "Discern visually" , "Bishop's diocese" , "Observe - diocese" , "Go out with; notice" .)