Street musician's song from West Side Story character (8)
I believe the answer is:
mariachi
'street musician's song from west side story character' is the definition.
I can't judge whether this defines the answer.
'song from west side story character' is the wordplay.
'song from west side story' becomes 'maria' (I've seen this in another clue).
'character' becomes 'chi' (chi is a kind of character).
'maria'+'chi'='MARIACHI'
Can you help me to learn more?
(Other definitions for mariachi that I've seen before include "street musicians?" , "Utters" , "one who performs music" , "Mexican players" , "Traditional Mexican folk music" .)