Deliver a speech (5)
I believe the answer is:
orate
'deliver a speech' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for orate that I've seen before include "Speak pompously and at length" , "Make a pompous speech" , "Speak in public" , "Deliver a speech" , "Erato (anag.)" .)