The most common and most likely answer to this crossword clue is the 10 letter word REORDERING
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Buddy explains!
The straight part
We know that "Mixture" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case mixture = reordering.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does REORDERING mean?
REORDERING verb- To place in a new order; to rearrange.
- To order (a product, etc.) again.
- To order or command again; to repeat an instruction to.
- A rearrangement.