Crossword Genius

A mix-up at the sale (6)

Ross

I believe the answer is:

jumble

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

'sale' is the definition.
(jumble sale is a kind of sale)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for jumble that I've seen before include "Muddle" , "Discarded assortment (for sale?)" , "Hodgepodge" , "Mix confusedly" , "Mixed-up collection (for sale)" .)

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