Talk given to an audience (6)
I believe the answer is:
speech
'talk given to an audience' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for speech that I've seen before include "Communication by word of mouth" , "Formal talk to an audience" , "'Utterance, talk (6)'" , "Vocal communication" , "Oral form of communication" .)