Resolute due to threats perhaps (12)

I believe the answer is:

stouthearted

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'resolute' is the definition.
Both the definition and answer are adjectives. Perhaps there's an association between them I don't understand?

'due to threats perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'due'+'to'+'threats'='duetothreats'
'duetothreats' with letters rearranged gives 'STOUTHEARTED'.

Can you help me to learn more?

(Another definition for stouthearted that I've seen is " Courageous, resolute".)

I've seen this clue in The Globe and Mail.

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