Wince (6)
(Other definitions for cringe that I've seen before include "Shrink in fear, embarrassment, or servility" , "Cower, shrink in fear" , "Shrink back, cower" , "Sneak" , "Recoil in embarrassment" .)
'wince' is the definition.
(I know that wince can be written as flinch)
This is the entire clue.
(Other definitions for flinch that I've seen before include "Draw back, with fear or pain" , "Wince or draw back in fear" , "Shy away" , "Shrink back with fear" , "Shrink back (out of pain/fear)" .)