The most common and most likely answer to this crossword clue is the 8 letter word TINSELLY
I've seen this crossword clue in The Times
T
I
N
S
E
L
L
Y
More clues leading to the result TINSELLY
- In the box, fashionable items ultimately glittering
- Offer to contribute to very modest gaudy
- Gaudy stock stuffed in pocket
- Flashy and cheap little houses to auction off
- Silently transformed to be 13 across
- Showy and fashionable piece of silk found in the box
- Flashy and small, outside market
- Glittering hawk, in miniature
- Cheap and flashy market in miniature
- Gaudy little skirts are popular with consumers
Buddy explains!

The straight part
We know that "gaudy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case gaudy = tinselly.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.