As verbs the difference between flinching and clinching
is that flinching is present participle of flinch while clinching is present participle of clinch.
As a noun flinching
is a flinching motion; a flinch.
As an adjective clinching is
that settles something (such as an argument) definitely and conclusively.
clinching
English
Verb
(head)
Adjective
(-)
That settles something (such as an argument) definitely and conclusively