Michael Jackson's first solo album on Epic Records, produced by Quincy Jones (3,3,4)

I believe the answer is:

off the wall

(Other definitions for off the wall that I've seen before include "Without preparation - unconventional" , "Grossly unconventional" , "unexpected" , "Peeling wallpaper" , "as Humpty-Dumpty ended up" .)

I've seen this clue in The Independent.

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