The most common and most likely answer to this crossword clue is the 5 letter word AMONG
I've seen this crossword clue in Financial Times
A
M
O
N
G
More clues leading to the result AMONG
- Surrounded by part of team on green
- In area, going to avoid centre
- Silver inscribed with second name between
- Included in team on green missing some
- In the middle of stewing mango
- Get in the middle of some? Dream on, girl!
- In the middle of day, arrested by American Government
- Within a second, nosebag is empty
- Surrounded by some roving nomads heading west
- In midst of returning group of wandering nomads
Buddy explains!

The straight part
We know that "Within" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case within = among.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 AMONG mean?
AMONG preposition- Denotes a mingling or intermixing with distinct or separable objects. (See Usage Note at amidst.)
- Denotes a belonging of a person or a thing to a group.
- Denotes a sharing of a common feature in a group.