Scene shot with vocals is getting better (11)

I believe the answer is:

convalesces

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'is getting better' is the definition.
I can't judge whether this definition defines the answer.

'scene shot with vocals' is the wordplay.
'shot with' indicates anagramming the letters.
'scene' mixed up with 'vocals' can make 'CONVALESCES'.

Can you help me to learn more?

I've seen this clue in The Guardian.

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