American tug with sizable barge finally behind (6)

I believe the answer is:

yankee

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'american' is the definition.
(I know that Yankee is a type of american)

'tug with sizable barge finally behind' is the wordplay.
'tug with' becomes 'yank' (both can mean to pull. I am not sure about the 'with' bit.).
'finally' indicates one should take the final letters.
'behind' is a charade indicator (letters next to each other).
The final letters of 'sizable barge' are 'ee'.
'yank'+'ee'='YANKEE'

Can you help me to learn more?

(Other definitions for yankee that I've seen before include "baseballer?" , "A bet on multiple horses" , "Code word for Y" , "1942 film with James Cagney" , "Northern soldier in the American Civil War" .)

I've seen this clue in The Times.

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