An ace out at sea? (8)

I believe the answer is:

oceanaut

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'an ace out at sea?' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'an ace out at sea?' is the wordplay.
'at sea?' indicates anagramming the letters (I've seen 'at sea' mean this).
'an'+'ace'+'out'='anaceout'
'anaceout' with letters rearranged gives 'OCEANAUT'.

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(Another definition for oceanaut that I've seen is " Skilled underwater worker or scientist - an ace out (anag)".)

I've seen this clue in The Times.

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