Audience's left with unusually great sight (5,5)
I believe the answer is:
stage right
'audience's left' is the definition.
The definition and answer can be both locations as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'with unusually great sight' is the wordplay.
'with' indicates putting letters inside.
'unusually' indicates an anagram.
'great' is an anagram of 'tager'.
'tager' put inside 'sight' is 'STAGE RIGHT'.
Can you help me to learn more?
(Other definitions for stage right that I've seen before include "Where player can appear" , "Left, for audience" , "One side of the house" , "That's left to the patrons" , "dramatic direction" .)