The most common and most likely answer to this crossword clue is the 5 letter word FLOUT
I've seen this crossword clue in The Times
F
L
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T
More clues leading to the result FLOUT
- Disregard female accompanied by yob
- Disrespect shown by loud, aggressive sort
- Show contempt for leader of faction
- Defy consequences of nuclear incident, stealing aluminium
- Show contempt for loud hooligan
- Mock loudly opener from Lancashire getting dismissed
- Defy loud yob
- Defy parade after a Nationalist is killed for nothing
Buddy explains!

The straight part
We know that "Show contempt for" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case show contempt for = flout.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 FLOUT mean?
FLOUT noun- The act by which something is flouted; violation of a law.
- A mockery or insult.
- To express contempt for (laws, rules, etc.) by word or action.
- To scorn.