The most common and most likely answer to this crossword clue is the 4 letter word FUND
I've seen this crossword clue in The Times
F
U
N
D
More clues leading to the result FUND
- Play day in pool
- Enjoyable day in pool
- Sport heading for diving pool
- Enjoyable day in store
- Kitty entertaining daughter
- Money supply discovered, nothing missing
- Friend’s aura ruined after cancellation of a charity event
- Supply cash for daughter chasing entertainment
- Diverting money extracted from admirers before organising charity event
- Supply cash for entertainment on date
Buddy explains!

The straight part
We know that "pool" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pool = fund.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 FUND mean?
FUND noun- A sum or source of money.
- An organization managing such money.
- A money-management operation, such as a mutual fund.
- A large supply of something to be drawn upon.
- To pay for.
- To place (money) in a fund.
- To form a debt into a stock charged with interest.