Excellent game is played (4)
I believe the answer is:
mega
'excellent' is the definition.
(old-fashioned UK slang for 'very good')
'game is played' is the wordplay.
'is played' is an anagram indicator.
'game' is an anagram of 'MEGA'.
(Other definitions for mega that I've seen before include "Game (anag) -- great" , "extremely good" , "Game (anag) - excellent" , "Very large (colloq.)" , "'Excellent, colloquially (4)'" .)