Wiktionary
clinchers
n. (plural of clincher English)
Usage examples of "clinchers".
They'd be the clinchers, but he'd need them to get wherever he was going.
It did not appear to Venetia that he took much part in the rearing of his offspring or in the management of his household, but he was held in great respect by everyone, his few commands being instantly and unquestioningly obeyed, and any of his reported utterances being accepted as clinchers to every dispute.