It’s foolish, great show missed (5)
I believe the answer is:
antic
'it's foolish' is the definition.
(thesaurus)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for antic that I've seen before include "Absurd act" , "Absurd action" , "old buffoon" , "Caper, trick" , "Ludicrous act done for fun" .)