Tommy - Thomas - has a story (4)
I believe the answer is:
myth
'a story' is the definition.
(I know that myth is a type of story)
'tommy thomas has' is the wordplay.
'has' indicates the answer is hidden within the clue.
'MYTH' can be found hidden inside 'tommy thomas'.
(Other definitions for myth that I've seen before include "Fiction" , "Common false belief" , "A widely held but false belief" , "Fanciful story" , "Invention" .)