The most common and most likely answer to this crossword clue is the 5 letter word SPIVS
S
P
I
V
S
Buddy explains!
The straight part
We know that "flashy dressers" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case flashy dressers = spivs.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 SPIVS mean?
SPIVS noun- A smartly dressed person who trades in illicit, black-market or stolen goods.
- A flashy con artist, often homeless, who lives by his wits.
- In Scotland Yard usage, a low and common thief.
- A slacker; one who shirks responsibility.