Crossword Genius

Aisle splattered with some cooking fat (6,3)

Ross

I believe the answer is:

sesame oil

I'm a little stuck... Click here to teach me more about this clue!

'fat' is the definition.
(I know that sesame oil is a type of vegetable oil)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Another definition for sesame oil that I've seen is " Substance obtained from seeds".)

I've seen this clue in The Independent.
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