Sentence:  Weirdly, Renton doesn't look too much older and the same also goes for Sick Boy (Jonny Lee Miller), who has exchanged heroin for cocaine and nowadays runs an escort-and-blackmail business, secretly videoing clients and <WSD>extorting</WSD> money, working with his female business partner, Veronika (Anjela Nedyalkova). 
Meaning of the word marked with <WSD> tags:  To obtain by means of the offense of extortion.