Female fortune-teller is upset over Times line (5)
I believe the answer is:
sibyl
'female fortune-teller' is the definition.
(I've seen this in another clue)
'is upset over times line' is the wordplay.
'upset over' shows that the letters should be reversed in order (knocked over).
'times' becomes 'by' (both can mean 'multiplied by').
'line' becomes 'l' (used when specifying particular lines from a poem).
'is' reversed gives 'si'.
'si'+'by'+'l'='SIBYL'
(Other definitions for sibyl that I've seen before include "Female oracle" , "One seeing future" , "Woman mouthpiece of a god, uttering prophecies" , "Seer in classical times" , "prophet" .)