Dance official vocal (4)
I believe the answer is:
reel
'dance' is the definition.
(reel is a kind of dance)
'official vocal' is the wordplay.
'official' becomes 'real'.
'vocal' indicates a 'sounds like' (homophone) clue.
'real' is a homophone of 'REEL'.
(Other definitions for reel that I've seen before include "Film spool" , "The angler pulls in his line using this" , "Highland dance" , "Cylinder on which something is wound" , "Stagger in Irish dance" .)