Crossword Genius

Flopped when champagne taken away? (7,3)

Ross

I believe the answer is:

fizzled out

'flopped' is the definition.
(both can mean failed or became insignificant)

'champagne taken away?' is the wordplay.
'champagne' becomes 'fizz' (I've seen this before).
'taken' becomes 'led' (to lead someone somewhere is to take them there).
'away?' becomes 'out' ('out' can be similar in meaning to 'away').
'fizz'+'led'+'out'='FIZZLED OUT'

'when' acts as a link.

I've seen this clue in The Guardian.
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