Crossword Genius

French ones are usually hot (and sticky?) (5)

Ross

I believe the answer is:

fries

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'french ones' is the definition.
Although both the answer and definition are plural nouns, I can't see how they can define each other.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for fries that I've seen before include "Cooks in fat" , "Cooks; chips (Amer.)" , "food for grazing?" .)

I've seen this clue in the Evening Standard.
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