Crossword Genius

Had to be mad (9)

Ross

I believe the answer is:

possessed

I believe this is a double definition.

'had' is the first definition.
('possess' can be a synonym of 'have')

'mad' is the second definition.
(thesaurus)

'to be' acts as a link.

(Other definitions for possessed that I've seen before include "It's collected" , "held as property" , "Demented" , "Enjoyed" , "being under a spell" .)

I've seen this clue in The Times and The Sunday Times.
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