State having abandoned function backed a routine singing style (10)
I believe the answer is:
coloratura
'singing style' is the definition.
'coloratura' can be an answer for 'singing' (thesaurus). I am unsure of the 'style' bit.
'state having abandoned function backed a routine' is the wordplay.
I cannot really understand how this works, but
'state' could be 'or' and 'or' is found in the answer.
'a' is within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for coloratura that I've seen before include "singer" , "Melba's speciality" , "embellished in bars" , "Noted embellishments" , "Elaborate vocal ornamentation" .)