Sentence:  As part of the same arrangement , Torrio had , in the spirit of peace and good will , and in <WSD>exchange</WSD> for armed support in the April election campaign , bestowed upon O ' Banion a third share in the Hawthorne Smoke Shop proceeds and a cut in the Cicero beer trade . 
Meaning of the word marked with <WSD> tags:  the act of changing one thing for another thing