Most are maddened with genius (7)

I believe the answer is:

maestro

I'm a little stuck... Click here to teach me more about this clue!

'genius' is the definition.
(I've seen this before)

'most are maddened' is the wordplay.
'most are' anagrams to 'MAESTRO'.
Though, I am unsure how the anagram is indicated.

'with' is the link.

Can you help me to learn more?

(Other definitions for maestro that I've seen before include "Accomplished musician" , "Highly talented figure in a given field" , "A master of any art, like music" , "Expert in music etc" , "Distinguished composer, conductor or performer" .)

I've seen this clue in The Sun.

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