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Strongly affected, rascal left and behaved (5)

Ross

I believe the answer is:

acted

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'behaved' is the definition.
('act' can be a synonym of 'behave')

I don't understand how the rest of the clue works.

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(Other definitions for acted that I've seen before include "produced an effect" , "Behaved in a certain manner" , "Took part in play" , "Worked" , "Play a role" .)

I've seen this clue in The Daily Express.
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