Celebrated performer of gangsta rap (4)
I believe the answer is:
star
'celebrated performer' is the definition.
(I've seen this before)
'of gangsta rap' is the wordplay.
'of' indicates the answer is hidden within the clue.
'STAR' can be found hidden inside 'gangsta rap'.
(Other definitions for star that I've seen before include "White blaze on a horse's forehead" , "A night light?" , "Luminary" , "Ball of fire" , "Distant sun" .)