Old bishop and priest giving us daggers (5)
I believe the answer is:
'us daggers' is the definition.
'obeli' can be an answer for 'daggers' (I've seen this before). I am unsure of the 'us' bit.
'old bishop and priest' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'bishop' becomes 'B' (chess abbreviation).
'and' is a charade indicator (letters next to each other).
'priest' becomes 'eli' (biblical figure).
'giving' is the link.
Can you help me to learn more?
(Other definitions for obeli that I've seen before include "see below, we explain)" , "Textual indicators" , "signs of doubt" , "Dagger signs in printing" , "Signs of death" .)