Speak to an audience (5)
I believe the answer is:
orate
'speak to an audience' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for orate that I've seen before include "Erato (anag.)" , "Declaim or rant" , "Pontificate" , "Give speech" , "Deliver a speech" .)