1The company's innovative marketing strategy helped clinch the deal with the major investor.
2After months of negotiations, the two parties finally managed to clinch an agreement.
3In the final round of the championship, the boxer's powerful punch helped him clinch victory.
4The researcher's groundbreaking discovery helped clinch the argument in favour of the new theory.
5The politician's charismatic speech helped clinch the support of the undecided voters, securing her party's win.