Visible to the audience (7)
I believe the answer is:
onstage
'visible to the audience' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for onstage that I've seen before include "as a player may be?" , "Facing house" , "In view of house" , "performing in the theatre?" , "Visible to (theatre) audience" .)