Current rock player (5)
I believe the answer is:
actor
'player' is the definition.
(I've seen this before)
'current rock' is the wordplay.
'current' becomes 'ac' (alternating current).
'rock' becomes 'tor' (tor is a kind of rock).
'ac'+'tor'='ACTOR'
(Other definitions for actor that I've seen before include "Films/stage worker" , "Thesp" , "Dramatic artist" , "Stage-player" , "Cruise maybe" .)