https://www.allmusic.com/artist/clint-eastwood-mn0000160428 has this about Clint Eastwood:

Born Robert Brammer, dancehall deejay Clint Eastwood first made a name for himself performing with deejay General Saint (born Winston Hislop) in Great Britain. Noted for putting on lively, theatrical and humorous performances, Eastwood and Saint came to be known as a novelty act in Jamaica. In the mid '80s the two split up to pursue solo careers. Their biggest selling album was Two Bad D.J. (1981).

Eastwood was born September 18, 1957 in Kingston, Jamaica

https://www.allmusic.com/artist/general-saint-mn0000202329 has this about General Saint, who was born in the 1950s:

Born Winston Hislop in Jamaica, dancehall deejay General Saint first made a name for himself performing with deejay Clint Eastwood (born Robert Brammer) in Great Britain. First recording with Junjo Lawes, Eastwood & Saint became noted for putting on lively, theatrical and humorous performances in the late '70s through the early '80s. At the height of their popularity they were known as one of Jamaica's better novelty acts. The two split up to pursue solo careers in the mid '80s. Their biggest selling album was Two Bad D.J. (1981).

But like I said above, I don't think they wrote the song recorded by the Spinners, and we still don't have a transcription of the Spinners song.