Crossword Genius

Know-all put out about the terrible din (6)

Ross

I believe the answer is:

pundit

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'know-all' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe there's a link between them I don't understand?

'out about the terrible din' is the wordplay.
'out' becomes 'put' (I can't justify this - if you can you should believe this answer much more).
'about' is an insertion indicator.
'the terrible' indicates an anagram.
'din' is an anagram of 'ndi'.
'put' going around 'ndi' is 'PUNDIT'.

'put' acts as a link.

Can you help me to learn more?

(Other definitions for pundit that I've seen before include "Person who is an authority on subject" , "Expert (sometimes self-appointed)" , "Expert in a particular field, often consulted" , "Maestro" , "An expert or critic in a particular field" .)

I've seen this clue in the Evening Standard.
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