What to do to present western music style (4)
I believe the answer is:
wrap
'what to do to present' is the definition.
(as in wrapping a gift or present)
'western music style' is the wordplay.
'western' becomes 'w'.
'music style' becomes 'rap' (musical genre).
'w'+'rap'='WRAP'
(Other definitions for wrap that I've seen before include "Loose outer garment" , "Cover a gift" , "Enclose in paper, for example" , "Shawl - fold in paper" , "Stole - parcel" .)