Book again - including a little champagne flute (8)
I believe the answer is:
recorder
'flute' is the definition.
(thesaurus)
'book again including a little champagne' is the wordplay.
I cannot really understand how this works, but
'book' could be 'record' (synonyms) and 'record' is found in the answer.
The remaining letters 'er' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for recorder that I've seen before include "found on the bench" , "A judge; a pipe" , "Fipple-flute" , "The one who takes notes and a tubular wind instrument" , "Wind instrument much used in schools" .)