The Grammy-winning song is a revered example of the group’s fruitful relationship with producer Norman Whitfield and his co-writer Barrett StrongThe Temptations’ soulful staple, “Cloud Nine,” released on October 25, 1968, is much celebrated as the first Motown song to win a Grammy. It’s also a revered exemplar of the group’s fruitful relationship with producer Norman Whitfield and his co-writer Barrett Strong. Recorded with a new-look Funk Brothers band featuring the wah-wah guitar of Dennis Coffey, it was also the marker of the taut, tense new sound the combined talents would create together from that point on. But as...