Music in Hollywood normally is turned up (5)
I believe the answer is:
rondo
'music' is the definition.
(rondo is a kind of music)
'in hollywood normally is turned up' is the wordplay.
'in' indicates the answer is hidden within the clue.
'is turned up' shows that the letters should be reversed in order.
'odnor' is hidden in the letters of 'hollywood normally'.
'odnor' written backwards gives 'RONDO'.
(Other definitions for rondo that I've seen before include "noted work" , "Type of movement" , "Donor (anag) - piece of music" , "Repetitive musical form" , "Piece of music with recurring theme" .)