What is Clinch ?
Clinch is (noun) 1. a position where two people hold each other tightly He found his girlfriend in a clinch with another man. 2. (in boxing) a position where both boxers hold on to each other The referee tried to separate the two boxers who were in a tight clinch. (NOTE: The plural is clinches.)(verb) 1. (in boxing) to hold each other tight The referee tried to stop the two boxers clinching. 2. to complete a deal He offered an extra 5% to clinch the deal.
source: Easier English, Student Dictionary Upper Intermediate Level