The most common and most likely answer to this crossword clue is the 11 letter word SURROUNDING
I've seen this crossword clue in The Guardian
S
U
R
R
O
U
N
D
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G
Buddy explains!
The straight part
We know that "all about" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case all about = surrounding.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 SURROUNDING mean?
SURROUNDING verb- To encircle something or simultaneously extend in all directions.
- To enclose or confine something on all sides so as to prevent escape.
- To pass around; to travel about; to circumnavigate.
- An outlying area; area in proximity to something
- An environment
- Which surrounds something