Some celebrated epic theatre show (6)
I believe the answer is:
depict
'show' is the definition.
(to depict is to show or portray)
'some celebrated epic theatre' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'DEPICT' is hidden within 'celebrated epic theatre'.
(Other definitions for depict that I've seen before include "Illustrate, describe in detail" , "'Show, portray (6)'" , "Show in form of picture, or describe in words" , "Make a likeness of" , "Represent in drawing or painting" .)