Crossword Genius

He’s after big things at sea (6)

Ross

I believe the answer is:

whaler

I'm a little stuck... Click here to teach me more about this clue!

'he's after big things at sea' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'he's' is the wordplay.
I cannot really see how this works, but
'he' could be 'hale' and 'hale' is located in the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for whaler that I've seen before include "one may go to work at sea" , "Aussie tramp?" , "boat carrying harpoons" , "Mammal-hunting boat" , "Seaman like Ahab" .)

I've seen this clue in the Evening Standard.
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