Very much without humour (9)
I believe the answer is:
seriously
'very much' is the definition.
(seriously can mean to a great degree)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for seriously that I've seen before include "In a solemn and thoughtful manner" , "Gravely" .)
I've seen this clue in The Times.
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