Talk again about wild caper (5)
I believe the answer is:
recap
'talk again about' is the definition.
'wild caper' is the wordplay.
'wild' is an anagram indicator.
'caper' anagrammed gives 'RECAP'.
(Other definitions for recap that I've seen before include "Caper (anag)" , "sum everything up" , "Go over old ground" , "Epitomize" , "Summarising statement" .)