Some forum basically for Cuban dance (5)
I believe the answer is:
rumba
'cuban dance' is the definition.
(I've seen this before)
'some forum basically for' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'RUMBA' is hidden in the letters of 'forum basically for'.
(Other definitions for rumba that I've seen before include "Burma (anag)" , "Afro-Cuban or ballroom dance" , "South American dance" , "Rhythmic dance of Cuban origin" , "Cuban folk dance" .)