Taught here commonly spoken Spanish course (8)

I believe the answer is:

tortilla

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'course' is the definition.
(I know that tortilla is a type of course)

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

Can you help me to learn more?

(Other definitions for tortilla that I've seen before include "Round flat Mexican cake" , "Spanish omelette" , "In which one may see salsa" , "Mexican flatbread" , "Littoral (anag.)" .)

I've seen this clue in The Telegraph.

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