Crossword Genius

Fish vessel reaches New York (5)

Ross

I believe the answer is:

tunny

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

'fish' is the definition.
(I know that tunny is a type of food fish)

'vessel reaches new york' is the wordplay.
'vessel reaches' becomes 'tun' (I can't explain this - if you can you should give a lot more credence to this answer).
'new york' becomes 'ny'.
'tun'+'ny'='TUNNY'

Can you help me to learn more?

(Other definitions for tunny that I've seen before include "Marine fish, the bluefin" , "Common food fish" , "Warm water food fish" , "Large marine fish" , "A tuna" .)

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