Man of defiance (3)

I believe the answer is:

ian

'man' is the definition.
(man's name)

'of defiance' is the wordplay.
'of' indicates the answer is hidden within the clue.
'IAN' is hidden in the letters of 'defiance'.

(Other definitions for ian that I've seen before include "Boy's name (Scottish?)" , "Scottish man's name" , "Male" , "Scottish John" , "- Botham, cricketer" .)

I've seen this clue in The Mirror.

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