Ska relative (6)
I believe the answer is:
reggae
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ska relative</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 reggae that I've seen before include "Music style from Jamaica" , "Bob Marley music" , "West Indian music with strong subsidiary beat" , "W.I. music" , "Bob Marley's music" .)