Again, having recovered from the effects of (4)

I believe the answer is:

over

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'again' is the definition.
(as in the phrases 'start over' and 'start again')

'recovered from the effects of' is the wordplay.
'OVER' is hidden within the letters.
But, I am unsure how this is indicated.

'having' acts as a link.

Can you help me to learn more?

(Other definitions for over that I've seen before include "Rouond of six bowls in cricket" , "Completely ended" , "Finished -- as a remainder" , "superior position" , "Concerning" .)

I've seen this clue in the Evening Standard.

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