Changes are about to encourage some music (6)
I believe the answer is:
reggae
'some music' is the definition.
(reggae is a kind of music)
'changes are about to encourage' is the wordplay.
'changes' is an anagram indicator.
'about' is an insertion indicator.
'to encourage' becomes 'egg'.
'are' anagrammed gives 'rae'.
'rae' going around 'egg' is 'REGGAE'.
(Other definitions for reggae that I've seen before include "Type of music developed in Jamaica in the 1960s" , "W.I. music" , "Bob Marley music" , "Jamaican musical style" , "Jamaican music style" .)