Viola from Carshalton (4)
I believe the answer is:
alto
'viola' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'from carshalton' is the wordplay.
'from' says the answer is hidden in the clue.
'ALTO' is hidden within 'carshalton'.
Can you help me to learn more?
(Other definitions for alto that I've seen before include "The highest adult male singing voice" , "Low female singing voice" , "Member of choir" , "Counter-tenor or contralto" , "Second of four parts (in singing)" .)