The most common and most likely answer to this crossword clue is the 5 letter word LUMPY
L
U
M
P
Y
More clues leading to the result LUMPY
Buddy explains!

The straight part
We know that "Unevenly mixed" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case unevenly mixed = lumpy.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 LUMPY mean?
LUMPY adjective- Full of lumps, not smooth.
- Of a water surface: covered in many small waves as a result of wind; choppy.