Wild caper included new jig (6)
I believe the answer is:
prance
'jig' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'wild caper included new' is the wordplay.
'wild' indicates an anagram.
'included' indicates putting letters inside.
'new' becomes 'n' (abbreviation as in New Testament NT).
'caper' is an anagram of 'prace'.
'prace' placed around 'n' is 'PRANCE'.
Can you help me to learn more?
(Other definitions for prance that I've seen before include "Leap or skip" , "Gambol" , "Frolic" , "Bound around" , "Swagger, cavort" .)