Summarise wild caper (5)
I believe the answer is:
recap
'summarise' is the definition.
(I know that recap is a more specific form of the action summarise)
'wild caper' is the wordplay.
'wild' indicates anagramming the letters.
'caper' with letters rearranged gives 'RECAP'.
(Other definitions for recap that I've seen before include "Summarise briefly (abbr)" , "Summary (abbr.)" , "Run through again (Inf)" , "Summarise at the end" , "Run over the points again" .)