Ballroom dance of Cuban origin (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ballroom dance of cuban origin</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for rumba that I've seen before include "music one can dance to" , "number of steps" , "South American dance" , "Lively Cuban dance" , "Umbra (anag)" .)
(Another definition for rhumba that I've seen is " Latin dance (alt sp)".)