Mexican music from aria: Chinese, partly (8)
I believe the answer is:
mariachi
'mexican music' is the definition.
'from aria chinese partly' is the wordplay.
'partly' says the answer is hidden in the clue.
'MARIACHI' is hidden in the letters of 'from aria chinese'.
(Other definitions for mariachi that I've seen before include "one who performs music" , "Traditional Mexican folk music" , "street musicians?" , "Utters" , "Mexican street musician" .)