A co-written work which is bubbly and refreshing? (5,5)

I believe the answer is:

tonic water

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'is bubbly and refreshing?' is the definition.
I can't tell whether this defines the answer.

'a co-written work' is the wordplay.
'work' is an anagram indicator.
'a'+'co'+'written'='acowritten'
'acowritten' anagrammed gives 'TONIC WATER'.

'which' is the link.

Can you help me to learn more?

(Other definitions for tonic water that I've seen before include "Mixer" , "Non-alcoholic drink" , "Aerated quinine drink" , "Accompaniment to gin" , "something for your gin?" .)

I've seen this clue in The Independent.

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