The most common and most likely answer to this crossword clue is the 8 letter word CAROUSED
C
A
R
O
U
S
E
D
More clues leading to the result CAROUSED
Buddy explains!

The straight part
We know that "had a wild party" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case had a wild party = caroused.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 CAROUSED mean?
CAROUSED verb- To engage in a noisy or drunken social gathering.
- To drink to excess.