Power-hungry people manage oil scam at sea (13)

I believe the answer is:

megalomaniacs

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'power-hungry people' is the definition.
I can't tell whether this defines the answer.

'manage oil scam at sea' is the wordplay.
'at sea' indicates an anagram.
'manage'+'oil'+'scam'='manageoilscam'
'manageoilscam' with letters rearranged gives 'MEGALOMANIACS'.

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I've seen this clue in The Telegraph.

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