Complicated tale a bore spun (9)
I believe the answer is:
elaborate
'complicated' is the definition.
(thesaurus)
'tale a bore spun' is the wordplay.
'spun' indicates anagramming the letters.
'tale'+'a'+'bore'='taleabore'
'taleabore' with letters rearranged gives 'ELABORATE'.
(Other definitions for elaborate that I've seen before include "Give more details" , "very busy" , "Complicated or fancy" , "Complicated - complex" , "Polish" .)