The most common and most likely answer to this crossword clue is the 6 letter word MOBBED
I've seen this crossword clue in Financial Times
M
O
B
B
E
D
More clues leading to the result MOBBED
Buddy explains!

The straight part
We know that "Surrounded" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case surrounded = mobbed.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 MOBBED mean?
MOBBED verb- To crowd around (someone), sometimes with hostility.
- To crowd into or around a place.
- To wrap up in, or cover with, a cowl.
- Crowded