The most common and most likely answer to this crossword clue is the 5 letter word LOUTS
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The straight part
We know that "hooligans" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case hooligans = louts.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 LOUTS mean?
LOUTS noun- A troublemaker, often violent; a rude violent person; a yob.
- A clownish, awkward fellow; a bumpkin.
- To treat as a lout or fool; to neglect; to disappoint.
- To bend, bow, stoop.