Crossword Genius

Dish cousin avoids at home more than once (8)

Ross

I believe the answer is:

couscous

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'dish' is the definition.
(I know that couscous is a type of dish)

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

Can you help me to learn more?

(Other definitions for couscous that I've seen before include "food" , "North African dish of crushed durum wheat" , "Semolina grains" , "African dish of crushed steamed semolina" , "Kind of African semolina" .)

I've seen this clue in The Times.
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