Northern masculine male leaves to get snack (5)

I believe the answer is:

nacho

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'snack' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for nacho that I've seen before include "part of a snack?" , "Small piece of tortilla with a topping" , "Tortilla crisp" , "Tortilla chip topped with cheese and spices" , "Mex. corn chip" .)

I've seen this clue in The Independent.

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