Sentence:  The Greek evidently fell for her , `` Monsieur X '' recounted , and to <WSD>clinch</WSD> what he thought was an affair in the making he gave her 100000 francs ( about $ 300 ) and led her to the roulette tables . 
Meaning of the word marked with <WSD> tags:  secure or fasten by flattening the ends of nails or bolts