The most common and most likely answer to this crossword clue is the 3 plus 5 letter word HEN PARTY
I've seen this crossword clue in The Sunday Telegraph
H
E
N
P
A
R
T
Y
More clues leading to the result HEN PARTY
- Enthusiastic about new beginning of partnership, after this?
- Without men, girls out dancing aren’t happy, oddly
- Get together before union’s hard on pay and rent chaos
- Ample bottles needed promptly, primarily for ladies’ event
- Girls’ night out in Perth – any drunk?
- One last night of debauchery, then pray for rehabilitation
- No men do?
- Final gathering in support of would-be union member
- Females celebrating, exuberant about new piano
- No blokes do
Buddy explains!

The straight part
We know that "Females celebrating" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case females celebrating = hen party.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.