a strong girth used on stock saddles, having a ring at each end to which a strap running from the saddle is secured.
a firm hold or tight grip.
This problem is a cinch.
something sure or easy:This problem is a cinch.
a person or thing certain to fulfill an expectation, esp. a team or contestant certain to win a sporting event:The Giants are a cinch to win Sunday's game.
—v.t.
to gird with a cinch; gird or bind firmly.
to seize on or make sure of; guarantee: Ability and hard work cinched her success.