Fanciful stories about Smyth? (5)
I believe the answer is:
myths
'fanciful stories' is the definition.
'about smyth?' is the wordplay.
'about' is an anagram indicator.
'smyth' is an anagram of 'MYTHS'.
(Other definitions for myths that I've seen before include "Fabulous tales" , "Legends to present truths" , "Widely held but false beliefs" , "Fables" , "Legendary stories" .)