Crossword Genius

Theatre episode one's screened (5)

Ross

I believe the answer is:

odeon

I'm a little stuck... Click here to teach me more about this clue!

'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" .)

I've seen this clue in the Sydney Morning Herald.
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