Singer soon rap-dancing (7)
I believe the answer is:
soprano
'singer' is the definition.
(soprano is a kind of singer)
'soon rap-dancing' is the wordplay.
'dancing' indicates an anagram.
'soon'+'rap'='soonrap'
'soonrap' is an anagram of 'SOPRANO'.
(Other definitions for soprano that I've seen before include "gangster" , "Woman singing" , "Norman, perhaps" , "chorus girl, perhaps" , "High female voice" .)