The most common and most likely answer to this crossword clue is the 8 letter word UNTWINES
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The straight part
We know that "Disentangles" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case disentangles = untwines.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 UNTWINES mean?
UNTWINES verb- To untwist the strands of (something entwined).
- To free (one thing that is entwined with another), disentangle, extricate.
- To become untwisted or disentangled.