21 across
Ergo
ready
for
liquid
lunch?
(4)
Ergo ready for liquid lunch? (4)
hints
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checks
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hints
The definition is at the end of the clue.
How the clue works
The definition is liquid lunch?, a whimsical pointer to soup. It is built as a charade: SO (meaning ergo/therefore) followed by UP (meaning ready or prepared), giving SOUP.