On the original studio recording the Clavinet part was over-dubbed at least three times...that's why Stevie has the extra clavinet players on live performances.
The on-board Soul Shuffle style (in the R&B category) on Tyros2/3/4 is fairly accurate, with Intro II being pretty close.
These would be available at PSR-Tutorial.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.