The most common and most likely answer to this crossword clue is the 5 plus 3 letter word APRES SKI
I've seen this crossword clue in The Guardian
A
P
R
E
S
S
K
I
More clues leading to the result APRES SKI
- Chaotic end of Trump era ends with kiss-off – time to relax
- A child of the Fourth Estate endlessly partying in Zermatt, say?
- A junior reporter endlessly partying in St Moritz?
- With business no longer on the decline, newspapers must be stored in front half of a kiosk
- Sparks fly around eastern Italy; could it be the office party?
Buddy explains!

The straight part
We know that "partying in Zermatt, say" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case partying in zermatt, say = apres ski.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.