1986 Janet Jackson hit (5)
I believe the answer is:
nasty
'1986 janet jackson hit' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nasty that I've seen before include "One who sees the future" , "Highly unpleasant" , "Horrid, repugnant" , "Not nice" , "Beastly" .)