Music has upset listener eating food (6)
I believe the answer is:
reggae
'music' is the definition.
(reggae is a kind of music)
'upset listener eating food' is the wordplay.
'upset' says the letters should be written in reverse.
'listener' becomes 'ear' (I've seen this before).
'eating' is an insertion indicator.
'food' becomes 'egg' (egg is a kind of food**).
'ear' backwards is 'rae'.
'rae' enclosing 'egg' is 'REGGAE'.
'has' is the link.
(Other definitions for reggae that I've seen before include "Music style from Jamaica" , "W. Indian music style" , "Style of music originating in West Indies" , "Type of West Indian music" , "Jamaican music style" .)