English version

clincher

From Longman Dictionary of Contemporary Englishclincherclinch‧er /ˈklɪntʃə $ -ər/ noun [countable]  informalDECIDE a fact, action, or remark that finally persuades someone to do something, or that ends an argument, discussion, or competition Sixsmith scored the clincher after 81 minutes.
Examples from the Corpus
clincherIt's a statement that tends to produce a condescending smile, but in any discussion it is usually a clincher.And this, I think, was the final clincher.The real clincher was that it made better tea and beer than the pump muck.But while Mills put them ahead, the game was not safe until Tommy Wright's clincher three minutes from time.This latter piece of logic was the clincher and he dropped the idea as soon as he sobered up, the following week.Johnson's home run was the clincher for the Twins.The clincher came when we went to buy our Christmas tree last week.
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