Person in the audience (8)
I believe the answer is:
attendee
'person in the audience' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for attendee that I've seen before include "Person who is present at an event" , "Mixture for soaking meat in" , "One shows up" , "Someone who is here" , "One at a meeting; teen date (anag.)" .)