One cadet can produce a story (8)
I believe the answer is:
anecdote
'a story' is the definition.
(an amusing or interesting story)
'one cadet can produce' is the wordplay.
'can produce' indicates anagramming the letters (I've seen this in other clues).
'one'+'cadet'='onecadet'
'onecadet' is an anagram of 'ANECDOTE'.
(Other definitions for anecdote that I've seen before include "Humorous story" , "A short tale, usually true" , "A short interesting story, usually true" , "Brief story" , "Brief tale" .)