The most common and most likely answer to this crossword clue is the 7 letter word MOHAWKS
I've seen this crossword clue in Independent
M
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H
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More clues leading to the result MOHAWKS
Buddy explains!

The straight part
We know that "styles" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case styles = mohawks.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 MOHAWKS mean?
MOHAWKS noun- An individual member of the Mohawk people.
- (also mohawk) A hairstyle where both sides are shaved, with the hair along the crest of the head kept long, and usually styled so as to stand straight up.
- A member of a gang (the Mohocks) that terrorized London in the early 18th century.