Cryptic crossword clue
One of the party-givers gets house to split the expense 2-4

The most common and most likely answer to this crossword clue is the 7 letter word CO-HOST

I've seen this crossword clue in The Guardian
C
O
-
H
O
S
T

Buddy explains!

The straight part
We know that "One of the party-givers" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one of the party-givers = co-host.
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 CO-HOST mean?

CO-HOST noun
  1. A joint host alongside another (compare co-star).
CO-HOST verb
  1. To act as a joint host.
  2. To store data on a shared server (as in web hosting).

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