More than one very big ship is the naval order (10)

I believe the answer is:

leviathans

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'more than one very big ship' is the definition.
I can't judge whether this defines the answer.

'is the naval order' is the wordplay.
'order' indicates an anagram.
'is'+'the'+'naval'='isthenaval'
'isthenaval' anagrammed gives 'LEVIATHANS'.

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I've seen this clue in The Globe and Mail.

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