Ford, for the third time, nearly upset witch (8)
I believe the answer is:
sorcerer
'witch' is the definition.
(thesaurus)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for sorcerer that I've seen before include "In stories, he has magical powers that he uses to harm others" , "Potter, say" , "Male magician, wizard" , "Necromancer or wizard" , "Magician aided by evil spirits" .)