No place for carriage in mighty caper (5)
I believe the answer is:
antic
'caper' is the definition.
(synonyms)
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 action" , "seen to be bizarre, at one time" , "Caper; grotesque (arch.)" , "Eccentric once" , "Old clown" .)