Theatre bosses whine about leaving eastern States (4,8)
I believe the answer is:
show business
'theatre' is the definition.
(thesaurus)
'bosses whine about leaving eastern states' is the wordplay.
I cannot really see how this works, but
'eastern' could be 'e' and 'e' is located in the answer.
'states' could be 'us' (abbreviation for the United States) and 'us' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for show business that I've seen before include "The world of entertainment" , "Theatre/music industry" , "Entertainment industry" .)