Being performed by Lyric Theatre? (5)
I believe the answer is:
odeon
'theatre?' is the definition.
(in ancient Greece)
'being performed by lyric' is the wordplay.
'being performed' becomes 'on' (I've seen this in other clues).
'by' says to put letters next to each other.
'lyric' becomes 'ode' (ode is a kind of lyric).
'on' after 'ode' is 'ODEON'.
(Other definitions for odeon that I've seen before include "Do one (anag)" , "old theatre" , "Greek venue" , "Performances here no longer" , "Large UK cinema chain" .)