The most common and most likely answer to this crossword clue is the 6 letter word SNAPPY
I've seen this crossword clue in Financial Times
S
N
A
P
P
Y
More clues leading to the result SNAPPY
- Fashionable babywear on sale, three-quarters off
- Smart and trendy? It’s what fast movers make it
- Irritable agent ringing down
- Small item baby wears, fashionable
- Irritable secret agent snatching quick kip
- Sharp agent raking in pile
- Small garment for baby, rather smart
- Second cloth for baby, quick
- Smart game to play outside
- . Play heartless game to get ahead quick
Buddy explains!

The straight part
We know that "Quick/sort of dresser" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case quick/sort of dresser = snappy.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 SNAPPY mean?
SNAPPY adjective- Rapid and without delay.
- Irritable.
- Tidy; well-dressed; sharp.
- Chilly, brisk, sharp.