Arthur lost at sea with frequent waves (10)

I believe the answer is:

ultrashort

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'arthur lost at sea with frequent waves' is the definition.
I can't tell whether this definition defines the answer.

'arthur lost at sea' is the wordplay.
'at sea' indicates an anagram.
'arthur'+'lost'='arthurlost'
'arthurlost' with letters rearranged gives 'ULTRASHORT'.

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I've seen this clue in The Telegraph.

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