Amusing tale one acted out (8)
I believe the answer is:
anecdote
'amusing tale' is the definition.
(I've seen this before)
'one acted out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'one'+'acted'='oneacted'
'oneacted' anagrammed gives 'ANECDOTE'.
(Other definitions for anecdote that I've seen before include "A short interesting story, usually true" , "Short enteryaining tale" , "Pithy account of an incident" , "Neat code (anag.)" , "Short account of an incident" .)