Show Greek character carrying six (5)
I believe the answer is:
evita
'show' is the definition.
(musical)
'greek character carrying six' is the wordplay.
'greek character' becomes 'eta' (letter from the Greek alphabet).
'carrying' is an insertion indicator.
'six' becomes 'vi' (roman numeral).
'eta' placed around 'vi' is 'EVITA'.
(Other definitions for evita that I've seen before include "Musical based on Argentine leader" , "Well-known musical" , "Show" , "Juan Peron's wife" , "Andrew Lloyd Webber musical set in Argentina" .)