Flinch from a backlash (6)
I believe the answer is:
recoil
I believe this clue is a double definition.
'flinch' is the first definition.
(I've seen this before)
'a backlash' is the second definition.
('recoil' can be a synonym of 'backlash')
'from' is the link.
(Other definitions for recoil that I've seen before include "Fossil reptile" , "Kick of gun" , "Spring back in horror" , "Spring back; flinch" , "Stagger back" .)