something (as a fact or argument) that is decisive or overwhelmingthe fact that the resort had tennis courts was the clincher in our deciding to stay there
the fact that the resort had tennis courts was the clincher in our deciding to stay there
capper, coup de grâce(or coup de grace), crusher, topper
confutation, deathblow, knockoutdeterminant, factor
ace in the hole
in 1703
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