Present judge to the audience (4)
I believe the answer is:
here
'present' is the definition.
(both can mean in attendance)
'judge to the audience' is the wordplay.
'judge' becomes 'hear' (as in to hear a court case).
'to the audience' shows a homophone (sound like).
'hear' sounds like 'HERE'.
(Other definitions for here that I've seen before include "On this spot" , "The present location" , "In attendance" , "At this stage" , "To hand" .)