The most common and most likely answer to this crossword clue is the 8 letter word SKEWBALD
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Buddy explains!
The straight part
We know that "patterned jumper perhaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case patterned jumper perhaps = skewbald.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 SKEWBALD mean?
SKEWBALD noun- A skewbald horse.
- (of horses) Marked with patches of white and non-black colours.