Theatre episode one's screened (5)
I believe the answer is:
odeon
'theatre' is the definition.
(in ancient Greece)
'episode one's screened' is the wordplay.
'ODEON' is hidden within the letters.
However, I am unsure how this is indicated.
Can you help me to learn more?
(Other definitions for odeon that I've seen before include "Ancient Greek building for music" , "Theatre of ancient Rome - picture house" , "old theatre" , "music performed here" , "Ancient Greek concert hall" .)