Sentence:  He was also at this time , although not so interwoven in high politics and the <WSD>rackets</WSD> as Torrio and Capone , the most powerful and most dangerous mob leader in the Chicago underworld , the roughneck king . 
Meaning of the word marked with <WSD> tags:  an illegal enterprise (such as extortion or fraud or drug peddling or prostitution) carried on for profit