Speak on religion and theological events, primarily (5)
I believe the answer is:
orate
'speak' is the definition.
(orating is a kind of speaking)
'on religion and theological events primarily' is the wordplay.
'primarily' suggests taking the first letters.
The initial letters of 'on religion and theological events' is 'ORATE'.
(Other definitions for orate that I've seen before include "Declaim or rant" , "Make a formal address" , "Make a formal speech" , "talk at length" , "Speak formally" .)