"The Sweetest Taboo" singer, 1985 (4)
I believe the answer is:
sade
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the sweetest taboo singer 1985</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sade that I've seen before include "Jazz-pop group" , "The Marquis de . . . . was noted for cruelty" , "letter from Israel?" , "Hebrew character" , "The Marquis de .... was renowned for cruelty" .)