Crossword Genius

A word about Max (3)

Ross

I believe the answer is:

mad

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

'a word about max' is the definition.
I can't judge whether this defines the answer.

'a word about' is the wordplay.
'word' becomes 'md' (I can't justify this - if you can you should give a lot more credence to this answer).
'about' is an insertion indicator.
'a' placed inside 'md' is 'MAD'.

Can you help me to learn more?

(Other definitions for mad that I've seen before include "Extremely foolish" , "Berserk" , "lunatic" , "Frantic" , "Roused to anger" .)

I've seen this clue in the Evening Standard.
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