Exciting tale involved her till end of November (8)
I believe the answer is:
Here is my best explanation:
'exciting tale' is the definition.
'involved her till end of november' is the wordplay.
'involved' indicates anagramming the letters.
'end of' says to take the final letters.
The last letter of 'november' is 'r'.
'hertill' with letters rearranged gives 'thrille'.
(Other definitions for thriller that I've seen before include "Suspenseful adventure story", "Let her trill in exciting book or film", "The Birds', say", "suspenseful book?", "Exciting story or film", "work firing people", "A mystery, perhaps", "Suspense novel", "best-selling album" and "A detective story can be sensational".)