The most common and most likely answer to this crossword clue is the 5 letter word MERGE
M
E
R
G
E
More clues leading to the result MERGE
- Mix gallons in pool
- Join in swimming finally in lake
- Mark Francois led group into Middle East compound
- Good in lake and pool
- Come together in lake, shipping gallons
- Join German in pool
- Get involved in someone else’s business?
- Join forces in summer get-together
- What motorways often do during summer getaways
- Drummer gently crushes 'Come Together'
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 = merge.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 MERGE mean?
MERGE noun- The joining together of multiple sources.
- To combine into a whole.
- To combine into a whole.
- To blend gradually into something else.