Performed hip-hop for audience, wholly engrossed (4)
I believe the answer is:
rapt
'wholly engrossed' is the definition.
(I've seen this in another clue)
'performed hip-hop for audience' is the wordplay.
'performed hip-hop' becomes 'rapped' (hip-hop often features rap).
'for audience' shows a homophone (sound like).
'rapped' is a homophone of 'RAPT'.
(Other definitions for rapt that I've seen before include "Absorbed and enchanted" , "Part (anag.)" , "Spellbound in part" , "Fully intent, fascinated" , "Taken up entirely" .)