Embittered bear acted strangely (9)

I believe the answer is:

acerbated

'embittered' is the definition.
('acerbate' can be a synonym of 'embitter')

'bear acted strangely' is the wordplay.
'strangely' indicates anagramming the letters.
'bear'+'acted'='bearacted'
'bearacted' is an anagram of 'ACERBATED'.

I've seen this clue in The Daily Express.

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