clinch ‧ er /ˈklɪntʃə $ -ər/ BrE AmE noun [countable]
informal 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.
clinch ‧ er /ˈklɪntʃə $ -ər/ BrE AmE noun [countable]
informal 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.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012